Productivity and technical change /
W. E. G. Salter.
- 1st paperback ed.
- Cambridge : Cambridge U.P., 1969.
- xiv, 220 p. : tables, diagrs. ; 25 cm.
- University of Cambridge. Department of Applied Economics. Monographs, 6 .
- 6. Monographs (University of Cambridge. Department of Applied Economics) ; .