000 00275nam a2200109Ia 4500
008 221001s1971 xx 000 0 eng d
082 _a330.1 ECO
245 0 _aEconomics of texhnological change
260 _aEngland
_bPenguin Books
_c1971
300 _a509p.
942 _2ddc
_cBK
999 _c26325
_d26325