REFERENCES
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- Blums , P. , Kozellek , K and Hudec , K. 1989 . “ Pochard ” . In Aythya ferina 63 – 135 . (L.). Migrations of Birds of Eastern Europe and Northern Asia. Anseriformes. Editor-in-chief of the series D.S. Pavlov, editor of the volume J. Viksne. Moscow, Nauka, (in Russian, texts to figures and tables also in English).
- Kats , E. B. , Krivonosov , G. A. and Reutsky , N. D. 1997 . “ Garganey ” . In Anas querquedula Edited by: Pavlov , D. S. 246 – 296 . L. Migrations of Birds of Eastern Europe and Northern Asia. Anseriformes. Editor-in-chief of the series editor of the volume V.V. Bianki, I.N. Dobrynina. Moscow, Nauka. (in Russian, with English summary).
- Kotyukov , Y. V. and Rusanov , G. M. 1997 . “ Mallard ” . In Anasplatyrhynchos 7 – 103 . L. Migrations of Birds of Eastern Europe and Northern Asia. Anseriformes. Editor-in-chief of the series D.S.Pavlov, editor of the volume V.V. Bianki, I.N. Dobrynina. Moscow, Nauka,. (in Russian, with English summary).
- Mednis , A. and Hudec , K. 1989 . Anas clypeata 7 – 63 . Shoveler—L. Migrations of Birds of Eastern Europe and Northern Asia. Anseriformes. Editor-in-chief of the series D.S. Pavlov, editor of the volume J. Viksne. Moscow, Nauka, (in Russian, texts to figures and tables also in English).
- Mihelson , H. A. 1970a . Seasonal distribution and geography of harvesting of the Latvian Tufted Duck according to ringing records. . Proc. VII Baltic Ornith. Conf. , 3 : 35 – 38 . Riga, (in Russian).
- Mihelson , H. A. 1970b . Seasonal distribution and geography of harvesting of the Latvian Shoveler according to ringing records. . Proc. VII Baltic Ornith. Conf. , 3 : 39 – 42 . Riga, (in Russian).
- Mihelson , H. and Mednis , A. 1976 . Seasonal distribution of the Shoveler and the Tufted Duck in the Latvian SSR according to ringing data. Bird Migration. Tallinn, Valgus 83 – 87 . (in Russian, with English summary).
- Viksne , J. 1997 . The Bird Lake Engure. Riga, Jana Seta Publishers 110