http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
xxvi, 897 pages : including 2 plates on 1 . frontispiece (folded map) ; 24 cm.
by Ivar Tidestrom and Sister Teresita Kittell.
A reprint pf pages 342-502 was published as Sister Teresita Kittell's thesis, Catholic University, under title: A critical revision of the compositae of Arizona and New Mexico.