00355nam a2200121Ia 4500008004100000082001900041100001900060245004000079260004100119300001400160490003100174700002800205260702b        |||||||| |||| 00| 0 eng d  a304.2bEh33.PR  aEhrlich, P. R.  aPopulation resources environmentb/  aSan Francisco:bW. H. Freeman,c1972  axv, 509p.  aSeries of books in Biology  aEhrlich, A. H.eauthor.