http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Structure elucidation of natural products by mass spectrometry [by] Herbert Budzikiewicz, Carl Djerassi [and] Dudley H. Williams
v. 1. Alkaloids.--v. 2. Steroids, terpenoids, sugars, and miscellaneous classes.
Companion volume to the authors' Interpretation of mass spectra of organic compounds.
Holden-Day series in physical techniques in chemistry