http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Trees and shrubs of the Rocky mountain region
with keys and descriptions for their identification
xvii, 244 pages : color frontispiece, illustrations, color plates. ; 18 cm.
by Burton O. Longyear ... illustrated with one hundred and twenty-eight pen drawings by the author and nine colored plates.