000 00289nam a2200121Ia 4500
008 220214s9999 xx 000 0 und d
100 _aChang S C
245 0 _aFractionation of soil phosphorus
260 _bSoil Science
_c1957
300 _a133-144
700 _aJackson M L
942 _cRE
999 _c45342
_d45342