A key to species of American owls
By: by Leon Kelso, U. S. Biological survey; with a list of the owls of the Americas, by Estelle H. Kelso; constituting biological leaflet no.4.
Contributors: Kelso, Estelle H.
Publisher: Intelligencer printing company
Published: 1934
Place of publication: [Lancaster, Pa.]
Language: eng
Number of pages: 101
Subjects: Owls.