000 00284nam a2200109Ia 4500
008 220204s9999 xx 000 0 und d
082 _a631.811.1:005
_bJOH
100 _aJohnson, J Benton
245 0 _aKjeldahl method for nitrogen determination
260 _aAthens
_c1991
942 _cBK
999 _c40581
_d40581