00815nam0-22002651i-450-990002598530403321000259853FED01000259853(Aleph)000259853FED0100025985320000920d1968----km-y0itay50------baENGConcetration and prince-cost margins in manufacturing industriesdi COLLINS Norman-PR ESTON LeeBerkeleyUniversity of California Press1968Collins,R. Norman368900Preston,Lee E.<1930- >ITUNINARICAUNIMARCBK9900025985304033210-8-172171ECAECAConcetration and prince-cost margins in manufacturing industries433974UNINAING01