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STRAHLER, A. N. (1952). HYPSOMETRIC (AREA-ALTITUDE) ANALYSIS OF EROSIONAL TOPOGRAPHY. Geological Society of America Bulletin, 63(11), 1117. https://doi.org/10.1130/0016-7606(1952)63[1117:haaoet]2.0.co;2
STRAHLER AN. HYPSOMETRIC (AREA-ALTITUDE) ANALYSIS OF EROSIONAL TOPOGRAPHY. Geological Society of America Bulletin. 1952;63(11):1117.