http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
"Exact reprint" of North Dakota Agricultural College Extension Service Special Circular, 1939.
Microfiche. Stanford, Calif. : Appropriate Technology Project, 1986. 1 microfiche ; 11 x 15 cm. (AT microfiche reference library ; 21-471).
AT microfiche reference library ; 21-471