Document 1111
Lind, H. 1986. The Problem of Black-Headed Gulls (Larus Ridibundus) Breeding Near Airports.. Proceedings of the International Bird Strike Committee, Copenhagen, Denmark IBSC18/WP19:209-216.
Lind, H. 1986. The Problem of Black-Headed Gulls (Larus Ridibundus) Breeding Near Airports.. Proceedings of the International Bird Strike Committee, Copenhagen, Denmark IBSC18/WP19:209-216.
