00441nam a2200169Ia 4500008004100000082001600041100001600057245002900073260004700102300000800149650001800157650002400175653001900199700001700218700002000235700001600255170901s1976    xx            000 0 und d  a591.5bG34E  aGilbert, N. 0aEcological Relationships  aFranmciscobW.H. Freeman and Companyc1976  a156  aPure Sciences  aZoological sciences  aAnimal ecology  aFrazer, B.D.  aGutierrez, A.P.  aJones, R.E.