http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Proceedings of the Association of Asphalt Paving Technologists, technical sessions
Association of Asphalt Paving Technologists
No meetings held in 1931, 1934, 1938; two meetings in 1932 (Jan. and Dec.)
1930, issued only in Proceedings of the 9th annual Asphalt Paving Conference. cf. Union list of serials.