http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
v.1. Energetics, tricarboxylic acid cycle, and carbohydrates. - xiv, 460 p. - 1967 -- v.2. Lipids, steroids, and carotenoids. - xiii, 311 p. - 1968 -- v.3. Amino acids and tetrapyrroles. - xiv, 622 p. - 1969 -- v.4. Nucleic acids, protein synthesis, and coenzymes. - xii, 499 p. - 1970.