Published in Bulletin of The British Ornithologists' Club, in 1937, in volume 57, pages 64-65

Published in Bulletin of The British Ornithologists' Club, in 1937, in volume 57, pages 66-67

Published in Bulletin of The British Ornithologists' Club, in 1937, in volume 57, pages 142-143

Published in Bulletin of The British Ornithologists' Club, in 1937, in volume 57, pages 148-150

Published in Bulletin of the British Ornithologists' Club, in 1937, in volume 57, pages 151-154

Published in Bulletin of The British Ornithologists' Club, in 1937, in volume 57, pages 154-157