The earth : man's geologic environment 2026-02-15T21:24:43+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Brown, George D., 1931; Ladd, George T. (George Thomas), 1941 (C.E. Merrill Pub. Co., 1976)