000 004030000a22001450004500
008 140223b1960 xxu||||| |||| 00| 0 eng d
041 _aeng
080 _aX K0
082 _aX K0
100 _aSalter W E G
245 _aProductivity and technical change
260 _aLondon
_bCUP
_c1960
440 _aCambridge University: Department of Applied Economics Monographs, No 6
650 _aEconometrics
999 _c168104
_d168104