00258nam a2200109Ia 4500082002000000100002100020245004900041260003300090300001500123500000500138700000500143  a304.2bSo728.EQ  aSouthwick, C. H.  aEcology and the quality of our environmentb  aNew YorkbVan Nostrandc1972  axvi, 319p.  a  a