http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Monthly (with additional Factbook issue in mid-June), <Oct. 1979->
Monthly (with additional Factbook issue in mid-May), 1958-
Issues for <Vol. 96, no. 13-> issued by: Adams Business Media.
Even numbered issues published <Apr. 3, 1940-June 26, 1940> each also called: Refining technology edition.
Separately paged section called Refining technology issued with the Refining technology edition issues; e.g. <pages R106-R244 with Apr. 3-June 26 1940 (even numbered issues)>
Technical section, included in issues for July 29, 1942-Aug. 7, 1946, continued as the separate publication: Petroleum processing.
Vols. for 1958-1991 include an annual Factbook issue.
Vols. for 1992- include an annual Market facts issue.