Published in Bulletin Br Orn Club, in 1973, in volume 93, pages 111-114

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

Published in Bulletin Br Orn Club, in 1973, in volume 93, pages 139-140

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

Published in Bulletin Br Orn Club, in 1973, in volume 93, pages 141-142

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

Published in Bulletin Br Orn Club, in 1973, in volume 93, pages 143-144

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

Published in Bulletin of the British Ornithologists' Club, in 1973, in volume 93, issue 4, pages 145-155

Created: 2014-03-05, modified: 2014-03-05