000 00244pam a2200109a 44500
082 _aTR
_bNBS-331
100 _aB. W. Mann
245 1 _aRadioactivity calibration standards
260 _a
_b
_c
700 _aB. S. Garfinkel
997 _aTR4204 C
999 _c405106
_d405106