000 00353nam a2200133Ia 4500
008 250621b |||||||| |||| 00| 0 eng d
041 _aE
100 _aWHO .TRS no. 771
245 _aWho expert committee on biological standardization
260 _aWorld Health Oraganization,Geneva
_c1988
300 _a221
942 _cRBK
999 _c62591
_d62591