000 00266nam a22001217a 4500
999 _c203907
_d203907
041 _aEnglish
082 _a630
_bNOR/AD
100 _aNorman A G
245 _aAdvances in agronomy Vol.15
260 _aLondon
_bAcademic press
_c1963
300 _a415p
942 _cREF