Environmental geology 2026-02-15T20:36:48+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Keller, Edward A., 1942-; Burt, E. M. (Charles E. Merrill, 1976)