000 00327nam a2200133Ia 4500
008 160316s1979 xxu||||| |||| 00| 0 eng d
020 _a
100 _aAlberto Valdes
245 _aEconomics And Design Of Small-Farmer Technology
250 _a1
260 _a
_bIOWA STATE UNIVERSITY PRESS
_c1979
300 _a211
700 _a
_a
999 _c6430
_d6430