00335nam a2200133Ia 4500008004100000082001700041100002000058245002400078260004200102300000800144650002000152650001400172653001500186170901s1943    xx            000 0 und d  a301.32bL18P  aLandis, Paul H. 0aPopulation Problems  aNew YorkbAmerican Book Companyc1943  a500  aSocial sciences  aSociology  aPopulation