http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Comparative breeding behavior of four species of North American herons
viii, 158 pages : illustrations, maps, diagrams, tables. ; 24 cm.
"Part of a doctoral dissertation presented to the faculty of the Biological Laboratories, Harvard University, in partial fulfillment of the requirements for the degree of doctor of philosophy, May 1958."
Publications of the Nuttall Ornithological Club ; no. 2