http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Nitrogen cycling in ecosystems of Latin America and the Caribbean
edited by G.P. Robertson, R. Herrera, T. Rosswall.
"Reprinted from Plant and soil, volume 67. (1982)."
Papers from a workshop held at Ciat, Cali, Colombia, in March 1981, which was arranged by the SCOPE/UNEP International Nitrogen Unit.
Developments in plant and soil sciences ; v. 6