000 00265nam a2200109Ia 4500
100 _aW.H.O.T.R.S.800
942 _cBK
245 _aWHO expert committee on biological standardization
260 _aW.H.O., Geneva
_c1990
082 _aR615.3/WHO/TRS W.H
300 _a224
999 _c32961
_d32961