00794nam0-22002651i-450-990002617210403321000261721FED01000261721(Aleph)000261721FED0100026172120000920d1965----km-y0itay50------baENGPatent and progress. The sources and impactof advancing technologydi ALDERSON-TER PSTRA-SHAPIROHomewood (Illinois)Irwin1965Alderson,Michael101969Terpstra,VernITUNINARICAUNIMARCBK9900026172104033210-7-5-TI2302ECAECAPatent and progress. The sources and impactof advancing technology433655UNINAING01