00807cam a2200277 4500 779977 BD-DhUL 20181206101647.0 740820s1981 nyua b 001 0 eng 73020875 0023900202 DLC DLC DLC BD-DhUL n-us--- 333.720973 OWN Owen, Oliver S. 1920- Natural resource conservation : an ecological approach / Oliver S. Owen. 3rd ed. New York : Macmillan, c1980. xi, 883 p. : ill. ; 26 cm. US$ 65.45 Includes bibliographical references and index. Conservation of natural resources. Ecology. Environmental protection. ddc BK 245091 245091 0 0 ddc 0 333_720973000000000_OWN 0 NFIC 373002 DUSL DUSL GEN 1984-04-12 Purchased 333.720973 OWN A257500 2018-12-06 8 2018-12-06 BK