Published in Bulletin of The British Ornithologists' Club, in 1956, in volume 76, pages 10-11

Published in Bulletin of The British Ornithologists' Club, in 1956, in volume 76, pages 14-16

Published in Bulletin of The British Ornithologists' Club, in 1956, in volume 76, pages 22-23

Published in Bulletin of The British Ornithologists' Club, in 1956, in volume 76, pages 38-42

Published in Bulletin of The British Ornithologists' Club, in 1956, in volume 76, pages 70-72

Published in Bulletin of The British Ornithologists' Club, in 1956, in volume 76, pages 89-92

Published in Bulletin of The British Ornithologists' Club, in 1956, in volume 76, pages 96

Published in Bulletin of The British Ornithologists' Club, in 1956, in volume 76, pages 115-119

Published in Bulletin of The British Ornithologists' Club, in 1956, in volume 76, pages 119-120

Published in Bulletin of The British Ornithologists' Club, in 1956, in volume 76, pages 132

Published in Bulletin of The British Ornithologists' Club, in 1956, in volume 76, pages 136-139

Published in Bulletin of The British Ornithologists' Club, in 1956, in volume 76, pages 160