Mansfield, Edwin Industrial research and technological innovation : an econometric analysis / Edwin Mansfield - New York : W. W. Norton, c1968. - xviii, 235 p. : ill. ; 23 cm. ISBN: LCCN: Subjects--Topical Terms: Technological innovationsUnited_states. Research IndustrialUnited_states. Econometrics LC Class. No.: HC110 / .T4M32 1968 Dewey Class. No.: 338.0973 / M287