http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Gas Processors Suppliers Association (U.S.)
2 volumes (loose-leaf) : illustrations ; 30 cm.
published as a service to the gas processing and related process industries by the Gas Processors Suppliers Association ; compiled and edited in co-operation with the Gas Processors Association.
Volume 1 Sections 1-16 -- volume 2 Sections 17-26.