00307nam a2200109Ia 4500008004100000040003800041100001900079245003300098260003700131300001700168653001200185211214s9999    xx            000 0 und d  cJayakar Knowledge Resource Centre  aElton, Charles 0aText book of animal ecology.  bSIDGWICK & JACKSONaLONDONc1953  aXX, 203 p p.  aZOOLOGY