00512nam a22001697a 4500 BD-DhUL 20150110151127.0 150110s1958 u a|||| |||| 001 0 eng d BD-DhUL BD-DhUL 631.43 WEH Weaver, Richard L. The national association of biology teachers : Handbook for teaching of conservation and resource use / Richard L Weaver. 502p. : ill. : 24 cm. Includes index. Soils. ddc BK 29428 29428 0 0 ddc 0 631_430000000000000_WEH 0 NFIC 55522 DUSL DUSL GEN 2015-01-10 631.43 WEH A68398 2015-01-10 2015-01-10 BK