http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Pacific Northwest Research Station (Portland, Or.)
Roger D. Fight, Bruce R. Hartsough, and Peter Noordijk.
Mode of access: Internet from the Forest Service web site. Address as of 1/3/07: http://www.treesearch.fs.fed.us/pubs/21806 (abstract), http://www.fs.fed.us/pnw/pubs/pnw%5fgtr668.pdf (PDF version); current access available via PURL.
Includes bibliographical references (pages 19-20).