Published in Bulletin of The British Ornithologists' Club, in 1953, in volume 73, pages 79-82
Published in Bulletin of The British Ornithologists' Club, in 1953, in volume 73, pages 83-84
Published in Bulletin of The British Ornithologists' Club, in 1953, in volume 73, pages 72
Published in Bulletin of The British Ornithologists' Club, in 1953, in volume 73, pages 33
Published in Bulletin of The British Ornithologists' Club, in 1953, in volume 73, pages 34-36
Published in Bulletin of The British Ornithologists' Club, in 1953, in volume 73, pages 77-79
Published in Bulletin of The British Ornithologists' Club, in 1953, in volume 73, pages 11-12