http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
migration of the monarch butterfly (Danaus plexippus)
1 folded sheet (8 pages) : illustrations, maps ; 22 x 10 cm.
by William H. Calvert ; illustration, Alicia N. Calvert.