000 00566 a2200253 4500
001 110999
020 _a
041 _aeng
080 _a535.33(083)Nat-1
245 _aAtomic energy levels : as derived from the analyses of optical spectra (R)
250 _a
260 _aWashington
260 _bNBS
260 _c1949
300 _av.1
300 _c33 cm
490 _aNational Bureau of Standards circular ; 467
700 _a
650 _a
650 _aPhysics
650 _aSpectrum analysis-Handbooks, Manuals etc.
942 _cRB
942 _2UDC
999 _c174275
_d174275