000 00297nam a22001217a 4500
003 OSt
008 230607b |||||||| |||| 00| 0 eng d
082 _a631.4
_bS99P
100 _aNational Academy of Science
245 _aSymposium on Soil Productivity
260 _bN.A.S.C
_c1972
942 _2ddc
_cBK
999 _c27178
_d27178