000 00399nam a2200145Ia 4500
008 170101s1992 xx 000 0 und d
041 _aEnglish
082 _aGN633.0072P847P
100 _aeFkqjs'k uUnu dqyJs B
245 0 _aMAXIMUM YIELD RESEARCH
260 _aBEIJING
_bCHINA AGRICULTURAL SCIENTECH PRESS
_c1992
300 _a272
_ePrint
653 _aMAXIMUM YIELD RESEARCH
942 _2ddc
_cBK
999 _c725292
_d725292