Published in Bulletin of the British Ornithologists' Club, in 1939, in volume 59, pages 50-53

Published in Bulletin of The British Ornithologists' Club, in 1939, in volume 59, pages 57-61

Published in Bulletin of The British Ornithologists' Club, in 1939, in volume 59, pages 69-70

Published in Bulletin of The British Ornithologists' Club, in 1939, in volume 59, pages 70-71

Published in Bulletin of The British Ornithologists' Club, in 1939, in volume 59, pages 102-103

Published in Bulletin of The British Ornithologists' Club, in 1939, in volume 59, pages 108-113

Published in Bulletin of the British Ornithologists' Club, in 1939, in volume 59, pages 130-134

Published in Bulletin of The British Ornithologists' Club, in 1939, in volume 59, pages 134-135

Published in Bulletin of The British Ornithologists' Club, in 1939, in volume 59, pages 153-155

Published in Bulletin of the British Ornithologists' Club, in 1939, in volume 59, pages 156

Published in Bulletin of the British Ornithologists' Club, in 1939, in volume 60, pages 9-11

Published in Bulletin of The British Ornithologists' Club, in 1939, in volume 60, pages 15-16