000 00279nam a2200097 4500
245 _aBiological management and conservation : ecological theory
_cM. B. Usher
100 _aUsher, M. B
260 _aLondon
_bChapman and Hall
_c1973
300 _axiii,394p.;24cm.
082 _a574.5
_bUSH
999 _c19012
_d19012