Literature type: Scientific
Volume: 103 , Pages: 443-471.
Full reference: Mountfort, G. & Fergusson-Lees, I.J. 1961. Observations on the birds of Bulgaria. Ibis 103: 443-471.
Literature type: Book
Full reference: Macgillivray, W. 1837. A history of British birds, indigenous and migratory: including their organization, habits, and relations; remarks on classification and nomenclature; an account of the principal organs of birds, and observations relative to practical ornithology. , Scott, Webster, and Geary, London. Vol.1, aquatic birds. 700pp.
Number of results: 24