000 00249nam a2200097Ia 4500
008 230508s1973 xx 000 0 und d
041 _aeng
100 _aD W HILL.
245 _aPRINCIPLES OF EE IN MEDI RESEARCH.
260 _bBUTER WORTH LANDAN.
_c1973
999 _c326063
_d326063