Report on the swallow enquiry, 1935.
Article
1937
British birds
v.30 June 1936-May1937
98-116
Eggs , Nest building , Swallows
Natural History Museum Library, London
English
London,
In copyright. Digitized with the permission of the rights holder.
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http://creativecommons.org/licenses/by-nc-sa/4.0/
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