Columbia subject headings:
Mass spectrometry--Indexes.
National Institutes of Health (U.S.)--Indexes.
Organic compounds--Spectra--Indexes.
United States. Environmental Protection Agency--Indexes.
Harvard subject headings:
Mass spectrometry--Indexes.
National Institutes of Health (U.S.)--Indexes.
Organic compounds--Spectra--Indexes.
United States. Environmental Protection Agency--Indexes.
Princeton subject headings:
Mass spectrometry.
Organic compounds--Spectra.