000 00298nam a2200121Ia 4500
001 113610
008 170722s9999 xx 000 0 und d
100 _aSpengler, Joseph J
245 _aDemographic analysis
_bSelected readings /
260 _c1963.
700 _aDuncan, Otis Dudley
942 _cGEN
999 _c60639
_d60639