Author: Holstein, Vagn.
Title: Duehogen Astur Gentilis Dubius (Sparrman). With an English summary. Mit deutscher Zusammenfassung.
Description: Kobenhavn, 1942. 155 pp. Ills. Soft cover. Private library stamp on cover and title page. (Biologiske studier over Danske rovfugle I).

Keywords: Birds of prey Roofvogels