00711nam0 2200229 450 00002184520090120133835.020090120d1968----km-y0itay50------baengUSy-------001yy<<The >>economics of technological changeEdwin MansfieldNew YorkW. W. Nortonc1968X, 257 p.24 cm<<The >>economics of technological change46786Cambiamento tecnologicoMansfield,Edwin1288ITUNIPARTHENOPE20090120RICAUNIMARC000021845640/23280NAVA22009Economics of technological change46786UNIPARTHENOPE