000 00311nam a2200121Ia 4500
100 _aWHO
020 _a92-4-120897--X
942 _cBK
245 _aWHO expert committee on biological standardization .-92-4-120897--X
260 _aWorld Health Organization, Geneva
_c1994
082 _aR 574 WHO
300 _a218
999 _c35745
_d35745