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RT Book, Whole SR Print DC OPAC T1 Natural resource conservation : an ecological approach / [by] Oliver S. Owen A1 Owen, Oliver S., 1920- YR 1971 FD c1971 SP xii, 593 p. K1 Conservation of natural resources -- United States K1 Ecology -- United States PB Macmillan PP New York LA English (英語) CL LCC:S938 CL DC:333.7/2/0973 NO Includes bibliographies NO 書誌ID=B000034872; NCID=BA1824649X; LK [OPAC]https://lib.pu-toyama.ac.jp/opac/opac_link/bibid/B000034872 OL 30