Published in Bulletin du Muséum national d'histoire naturelle, in 1937, in volume 9, issue 1, pages 50-53

Created: 2017-01-31, modified: 2017-01-31

Published in Bulletin du Muséum national d'histoire naturelle, in 1913, in volume 19, issue 7, pages 424-427

Created: 2022-01-10, modified: 2022-01-10

Published in Journal of Raptor Research, in 1992, in volume 26, issue 3, pages 159-166

Created: 2017-04-07, modified: 2017-04-07