Water birds -- Bulgaria : Mid-winter numbers of waterbirds in Bulgaria (1977-2001) : results from 25 years of mid-winter counts carried out at the most important Bulgarian wetlands / Tanyo Michev & Lyubomir Profirov
2003
1
Water birds -- Bulgaria -- Burgas Region : Waterbirds of Bourgas wetlands : results and evaluation of the monthly waterbird monitoring, 1996-2002 / Milko Dimitrov [and others] ; drawings, Assen Ignatov ; cover design, Ivan Yanchev ; editor of English translation, Vladimir Pomakov
Water birds -- Conservation -- Bulgaria -- Burgas Region : Waterbirds of Bourgas wetlands : results and evaluation of the monthly waterbird monitoring, 1996-2002 / Milko Dimitrov [and others] ; drawings, Assen Ignatov ; cover design, Ivan Yanchev ; editor of English translation, Vladimir Pomakov
Water birds -- Ecology -- Yellow Sea. : Invisible connections : why migrating shorebirds need the Yellow Sea / [photographs by] Jan van de Kam with Phill Battley ... [and others]
Water birds -- Macquarie Island : The Abundance of Royal Penguins (Eudyptes Schlegeli, Finsch) breeding at Macquarie Island / G.R. Copson and D.E. Rounsevell
Water birds -- Monitoring -- Bulgaria -- Burgas Region : Waterbirds of Bourgas wetlands : results and evaluation of the monthly waterbird monitoring, 1996-2002 / Milko Dimitrov [and others] ; drawings, Assen Ignatov ; cover design, Ivan Yanchev ; editor of English translation, Vladimir Pomakov
Water birds -- North America. : Audubon water bird guide : water, game and large land birds, eastern and central North America, from southern Texas to central Greenland. / Color illus. by Don Eckelberry, line drawings by Earl L. Poole