Brown, George D. The earth man's geologic environment George D. Brown and George T. Ladd - Ohio Charles E. Merrill Publishing 1976 - x+166p. figs; glossary; index; plates; tables ISBN: 0-675-08578-0 Subjects--Topical Terms: Geologic EnvironmentMan's Geologic Environment Universal Decimal Class. No.: 551.1/.4 / BRO+LAD