000 003200000a22001450004500
060 _a100
082 _a631.417 HOP
100 _aHopkins, Donald P
245 _aChemicals humus and the soil
260 _aUSA, Chemical publishing Co Inc
260 _c1948
300 _a358
650 _aFertilizers
942 _cBK
999 _c363794
_d363794