000 00346nam a2200133Ia 4500
008 220204s9999 xx 000 0 und d
082 _a631.4:546.17
_bBAR
245 0 _aSoil nitrogen
260 _aWisconsin
_bAmerican Soc of Agronomy
_c1965
650 _aSoil nitrogen
700 _aBartholomev, W V
700 _aClark, Francis E
942 _cBK
999 _c22509
_d22509