00642cam a2200193 a 4500 20241127202838.0 711012s1968 nyua b 00000 eng ANL eng NU BD-DhBPA 338.973 MAE 1968 Mansfield, Edwin, 1930- The economics of technological change / Edwin Mansfield. 1st ed. New York : W. W. Norton, c1968. x, 257 p. : ill. ; 25 cm. Bibliographical footnotes. Technological innovations United States. 40670 Research, Industrial United States. 40671 ddc BK 13902 13902 0 0 ddc 0 0 BPATC BPATC GEN 0 338.973 MAE 1968 20897 2018-04-10 00:00:00 2018-04-10 BK