000 00284nam a2200121Ia 4500
008 191031s9999 xx 000 0 und d
100 _aJames B.Sumner
245 0 _aChemistry and methods of enzymes
260 _bAcademic press
260 _c1953
365 _b56.25
942 _cBK
999 _c198142
_d198142