00565nam a2200145Ia 4500008004100000040001700041082002100058100002000079245005400099260004200153300001500195440005100210500009500261650006300356190328s9999||||xx |||||||||||||| ||und||  aNITILcNITIL  221sta312bP359N  aPearl, Raymonmd 4aThe Natural history of populationcRaymonmd Pearl  aLondonbOxford University Pressc1939  axii, 416p.  aHeath clark lectures 1937/university of London  aHeath clark lectures, 1937 delivered at the London School of Hygiene and Tropical Medicine  aPopulation-History; Sexual intercourse; Population biology