00490nam a2200169Ia 4500082002100000100001800021245005900039260004800098300001500146500000500161690000600166700000500172952010200177964001700279921000900296999001500305  a330.183bB879.OT  aBrown, Murray  aOn the theory and mesurement of technological changeb  aCambridgebCambridge University Pressc1966  axii, 214p.  a  a   a  00104070aISIbISId1998-06-16l0o330.183 B879.OTpDP2458r2019-02-14 00:00:00w2019-02-14yBK  abcdefg  a2701  c2701d2701