http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Proceedings of the Second International Symposium on Biological Control of Weeds, October 1971
International Symposium on Biological Control of Weeds 1971 : Rome)
Miscellaneous publication (Commonwealth Institute of Biological Control) ; no. 6