Published in Bulletin of The British Ornithologists' Club, in 1938, in volume 58, pages 91-93

Published in Bulletin of the British Ornithologists' Club, in 1938, in volume 58, pages 139

Published in Bulletin of The British Ornithologists' Club, in 1938, in volume 59, pages 8-9

Published in Bulletin of the British Ornithologists' Club, in 1938, in volume 59, pages 89-94