=LDR 22 4500 =001 5256 =082 04$a304.6072 PRE =100 1\$aPressat, Roland =245 10$aStatistical demography =260 \\$aLondon :$bMethuen,$c1978 =650 \0$aBooks =852 \\$bFreeman Library$h304.6072 PRE