Published in Bulletin of the British Ornithologists' Club, in 1929, in volume 50, pages 10-11

Published in Bulletin of The British Ornithologists' Club, in 1929, in volume 49, pages 63-64

Published in Bulletin of The British Ornithologists' Club, in 1929, in volume 49, pages 108-109

Published in Bulletin of The British Ornithologists' Club, in 1929, in volume 49, pages 90-91

Published in Bulletin of The British Ornithologists' Club, in 1929, in volume 49, pages 62-63

Published in Bulletin of The British Ornithologists' Club, in 1929, in volume 50, pages 6-7