Dusk and dawn ascend of the swift, Apus apus L.
Buurma, L.S. 2000. Dusk and dawn ascend of the swift, Apus apus L. Proceedings of the International Bird Strike Committee, Amsterdam. IBSC25/WP-BB2:1-14.
Buurma, L.S. 2000. Dusk and dawn ascend of the swift, Apus apus L. Proceedings of the International Bird Strike Committee, Amsterdam. IBSC25/WP-BB2:1-14.