STRAHLER, A. N., & STRAHLER, A. H. (1983). Modern physical geography.--Ed. 2. John Wiley and Sons.

STRAHLER, Arthur N., and Alan H. STRAHLER. Modern Physical Geography.--Ed. 2. New York: John Wiley and Sons, 1983.

STRAHLER, Arthur N., and Alan H. STRAHLER. Modern Physical Geography.--Ed. 2. John Wiley and Sons, 1983.