Recommendations for symbolism and nomenclature for mass spectroscopy
From Mass Spec Terms
http://www.iupac.org/publications/pac/50/1/0065/
Pure Appl. Chem., 1978, Vol. 50, No. 1, pp. 65-74
doi:10.1351/pac197850010065
PHYSICAL AND BIOPHYSICAL CHEMISTRY DIVISION COMMISSION ON MOLECULAR STRUCTURE AND SPECTROSCOPY
Recommendations for symbolism and nomenclature for mass spectroscopy