Published in Bulletin of The British Ornithologists' Club, in 1949, in volume 69, pages 50-56

Published in Bulletin of The British Ornithologists' Club, in 1949, in volume 69, pages 56-57

Published in Bulletin of the British Ornithologists' Club, in 1949, in volume 69, pages 70-71

Published in Bulletin of The British Ornithologists' Club, in 1949, in volume 69, pages 74-76

Published in Bulletin of the British Ornithologists' Club, in 1949, in volume 69, pages 83-84

Published in Bulletin of the British Ornithologists' Club, in 1949, in volume 69, pages 104-108