1. Migration ofFakoniformes and Ciconia spp. through the Straits of Gibraltar. Part 2.;Bernis;Ardeola,1980
2. Migration of raptors near Suez, Egypt, autumn 1981.;Bijlsma;Sandgrouse,1983
3. Patterns of high migration over the North Sea area in October.;Buurma;Limosa,1987
4. The spring migration of raptors in southern Israel and Sinai.;Christensen;Sand-grouse,1981