Population, resources, environment : issues in human ecology 2026-02-15T21:04:21+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Ehrlich, Paul R.; Ehrlich, Anne H (A Series of books in biology, 1972)