SP-399 SKYLAB EREP Investigations
FIGURE 6-16.-Portion 0f U.S.
Geological Survey topographic map showing central Arizona. Thin black
lines indicate boundaries of snow areas with differing reflectances
as mapped from an S190B photograph; H, M, and L indicate high,
medium, and low reflectance, respectively. Heavy black line indicates
snow boundary as depicted on aerial survey snow chart.
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