00301nam a2200109Ia 4500008004100000082001900041100002200060245004100082260002000123300001000143650003800153250707s9999||||xx |||||||||||||| ||und||  223a304.62 CIP  aCipolla, Carlo M. 0aEconomic history of world population  bHarvesterc1978  a127p.  aFactors affecting social behavior