http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
New Perspectives for Energy Savings in Agriculture
edited by V. Goedseels, E. Stuyft, U. Avermaete, H. Buis, W. Palz.
Solar energy R & D in the European Community. 2
Solar energy in agriculture and industry