Published in Bull. Brit. Orn. CI., in 1975, in volume 95, pages 41-45

Published in Bulletin Br Orn Club, in 1975, in volume 95, pages 51-54

Published in Bulletin Br Orn Club, in 1975, in volume 95, pages 59-62

Published in Bulletin Br Orn Club, in 1975, in volume 95, pages 98-101

Published in Bulletin Br Orn Club, in 1975, in volume 95, pages 101-104

Published in Bulletin Br Orn Club, in 1975, in volume 95, pages 175

Published in Bulletin of the British Ornithologists' Club, in 1975, in volume 95, issue 1, pages 18-19