Geological Survey (U.S.) & Witkind, I. J. (1972). Map showing snow avalanche probabilities in the Henrys Lake quadrangle, Idaho and Montana. U.S. Geological Survey.
Chicago Style (17th ed.) CitationGeological Survey (U.S.) and Irving J. Witkind. Map Showing Snow Avalanche Probabilities in the Henrys Lake Quadrangle, Idaho and Montana. Reston, Va.: U.S. Geological Survey, 1972.
MLA (9th ed.) CitationGeological Survey (U.S.) and Irving J. Witkind. Map Showing Snow Avalanche Probabilities in the Henrys Lake Quadrangle, Idaho and Montana. U.S. Geological Survey, 1972.
Warning: These citations may not always be 100% accurate.