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5by Summers, Ron W., Strann, Karl-Birger, Rae, Rab, Heggas, JanGet access
Published in Ornis Scandinavica (1990)
Article in Journal/Newspaper -
6by Davidson, Nicholas C., Strann, Karl-Birger, Crockford, Nicola J., Evans, Peter R., Richardson, John, Standen, Louis J., Townshend, David J., Uttley, John D., Wilson, James R., Wood, Andrew G.Get access
Published in Ornis Scandinavica (1986)
Article in Journal/Newspaper -
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