http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Proceedings of the 1st-4th annual conventions, 1919-22, were issued in separate sections for each year: 1. General sessions, 2. Accounting section, 3. Commercial section, 4. Manufacturers' section, 5. Technical section. 1923-1962 the proceedings of all sections are combined in an annual volume.