Published in Bulletin of the British Ornithologists' Club, in 1972, in volume 92, pages 53-57

Created: 2013-01-29, modified: 2013-01-29

Published in Bulletin Br Orn Club, in 1972, in volume 92, pages 138-141

Created: 2013-01-29, modified: 2013-01-29

Published in Bulletin Br Orn Club, in 1972, in volume 92, pages 142-144

Created: 2013-01-29, modified: 2013-01-29

Published in Bulletin of the British Ornithologists' Club, in 1972, in volume 92, issue 3 & 4, pages 106-113

Created: 2016-03-14, modified: 2016-03-14