Published in American Fern Journal, in 2001, in volume 91, pages 13-24

Created: 2017-04-23, modified: 2017-04-23

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 139-140

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

Published in Bulletin of The British Ornithologists' Club, in 1982, in volume 102, issue 3, pages 106-114

Created: 2012-12-03, modified: 2015-11-10