000 00268nam a2200109Ia 4500
020 _a818515144X
082 _a338.10954 SIN/G
100 _aAmrik Singh, ; Singh, Raj Pal
245 0 _aThe Green revolution : a symposium
260 _bHarman
_aNew Delhi
_c1990
942 _cBK
999 _c2093
_d2093