Data is taken from "Mars Surface Composition From Reflectance
Spectroscopy: A Summary"; Singer, et. al. ; JGR vol 84, 8415-8426, (1979).   
Figure 3 (Representative Dark Region Spectrum )
Column labeled "reflt" is geometric albedo scaled to 1.0 in the 1
micron region.


        wave           reflt          error       
        (microns)

        .330000        .214259        .008250
        .342000        .225981        .010207
        .363000        .208343        .007683
        .381000        .207151        .005141
        .404000        .242350        .006337
        .440000        .304599        .008007
        .475000        .368299        .006002
        .504000        .435753        .006530
        .540000        .552943        .007135
        .566000        .686686        .013899
        .600000        .832221        .014645
        .633000        .931029        .017075
        .620300       1.002937        .010094
        .633200       1.048111        .009063
        .644100       1.086725        .010580
        .656000       1.096983        .013628
        .667900       1.117898        .012059
        .679900       1.128430        .019048
        .691700       1.139110        .018834
        .704700       1.147979        .014208
        .716400       1.159085        .017560
        .728900       1.143423        .007159
        .739800       1.145229        .009813
        .751900       1.126660        .011716
        .763600       1.111953        .007823
        .775600       1.092715        .007132
        .786300       1.076242        .013203
        .799000       1.085038        .008591
        .811700       1.046774        .017893
        .822400       1.033783        .014693
        .837100       1.026548        .007335
        .849800       1.020545        .012069
        .862500       1.028644        .008074
        .875800       1.018445        .004536
        .887300       1.024815        .008562
        .899600       1.018119        .009535
        .911800       1.005632        .009478
        .924000       1.000386        .005562
        .936200        .996941        .003103
        .948400        .998160        .005532
        .961300        .995917        .008930
        .973500        .990823        .002609
        .986300        .997091        .003992
        .997800        .996908        .005412
       1.010800        .996739        .002450
       1.021800       1.007667        .008368
       1.034500       1.020727        .006074
       1.047100       1.021935        .014793
       1.059800       1.011884        .008937
       1.072500       1.015172        .014476
       1.085200       1.012117        .008324
       1.097800       1.004203        .005318
       1.109700       1.003940        .003729
       1.122700       1.002521        .004009
       1.135200       1.009832        .005439
       1.147700       1.003355        .004404
       1.160400       1.001299        .002103
       1.173000        .981261        .004507
       1.185500        .996791        .004604
       1.198100        .984073        .010077
       1.210600        .990353        .007287
       1.223200        .990992        .006519
       1.235700        .993498        .010707
       1.248100        .979463        .007513
       1.261500        .979105        .007793
       1.332200        .927232        .031626
       1.353400        .878942        .016082
       1.375400        .869515        .009009
       1.397900        .881733        .019952
       1.419900        .905914        .012655
       1.441900        .905129        .007347
       1.463700        .899276        .007105
       1.486400        .913508        .006322
       1.506700        .902248        .007634
       1.525400        .874574        .005923
       1.548700        .870632        .006310
       1.568900        .885285        .009338
       1.590400        .896069        .007238
       1.611900        .902745        .009027
       1.632900        .905011        .004557
       1.655200        .903695        .007339
       1.677500        .900471        .007135
       1.699800        .898206        .007205
       1.722100        .888763        .010843
       1.744300        .860465        .008732
       1.764700        .852819        .019223
       1.786700        .881367        .016665
       1.808500        .853802        .013334
       1.831200        .843842        .011890
       1.853200        .821441        .012046
       1.876200        .732361        .008061
       1.899200        .715256        .011747
       1.922200        .693983        .012821
       1.945000        .600179        .007340
       1.968000        .679243        .014233
       1.990900        .678284        .009933
       2.012400        .759315        .013116
       2.034900        .823624        .010422
       2.057900        .827651        .023492
       2.080900        .838697        .016431
       2.104100        .857035        .010173
       2.127200        .836028        .012285
       2.150400        .838486        .010371
       2.173600        .857126        .010488
       2.197000        .858976        .010025
       2.218800        .859402        .013199
       2.241800        .870737        .015467
       2.263900        .857818        .014930
       2.285800        .857233        .014815
       2.306300        .894977        .021257
       2.327800        .877985        .019413
       2.348900        .850485        .016667
       2.370100        .858323        .012944
       2.391600        .853818        .011826
       2.412600        .848305        .012537
       2.434600        .867141        .014444