http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Air Pollution Foundation (Los Angeles, Calif.)
Nos. 4, 14, 17, 22, 30 and 33 issued also as its Technical progress report.
Reports for 1954-57 numbered also v. 1-2.
Southern California Air Pollution Foundation.