http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
compilation of landfill gas field practices and procedures
Solid Waste Association of North America
1 τ. (ποικίλες σελιδαριθμήσεις) ; 28 εκ.
prepared by the Landfill Gas Division of the Solid Waste Association of North America (SWANA).