http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
their appearance, distribution, time of flowering, and their role in hayfever
xix, 1 unnumbered page, 245 pages including frontispiece, illustrations, tables. ; 27 cm.
with special reference to North America, by Roger P. Wodehouse.
A New series of plant science books. Vol. XV