Published in Bulletin of The British Ornithologists' Club, in 1952, in volume 72, pages 21-22

Created: 2013-01-29, modified: 2013-01-29

Published in Bulletin of The British Ornithologists' Club, in 1952, in volume 72, pages 22-33

Created: 2013-01-29, modified: 2013-01-29

Published in Bulletin of The British Ornithologists' Club, in 1952, in volume 72, pages 34-36

Created: 2013-01-29, modified: 2013-01-29

Published in Bulletin of The British Ornithologists' Club, in 1952, in volume 72, pages 95

Created: 2013-01-29, modified: 2013-01-29