00318nam a2200121Ia 4500008004100000040001700041041001200058082001500070100002200085245004200107260003500149300001200184230917s9999||||xx |||||||||||||| ||und||  e135069aMAIN  aEnglish  a547.5 S64E  aSmith, Robert Ceo 0aElements of ecology and field biology  aNew YorkbHarper and Rowc1977  a497p p.