TY - RPRT TI - EPANIH mass spectral data base : volume 4. molecular weights 381-1674 AU - Heller, Stephen R AU - Milne, G W A PY - 1978 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS NSRDS 63v4 DO - 10.6028/NBS.NSRDS.63v4 ER -