http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
x, 133 pages : 11 folded plates, illustrations, forms. ; 21 cm.
compiled by G. F. Peterken, including a Classification of vegetation for general purposes by F. R. Fosberg.
Classification of vegetation for general purposes. 1968