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1by Romanov, Michael N“... the swan goose (A. cygnoides) with some influences of A. anser and presumably bar-headed goose (A. indicus...”
Published 1995
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Book Part -
2by Johnsgard, Paul A.“... (Anser erythropus) and the bar-headed goose (Anser indicus), appear to have represented escapes from...”
Published 2010
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