00313nam a2200109Ia 4500082002000000100004100020245005000061260004000111300001400151500000500165700003300170  a312.091bK44.WP  aKeyfitz, Nathan and Flieger, Wilhelm  aWorld population; an analysis of vital datab  aChicagobUniv. of Chicago Pr.c1968  axi, 672p.  a  aFlieger, Wilhelm ; jt. auth.