Published in Annals of the Carnegie Museum, in 1955, in volume 33, pages 261-274

Published in Annals of the Carnegie Museum, in 1955, in volume 33, pages 275-285

Published in Annals of the Carnegie Museum, in 1955, in volume 33, pages 287-293

Published in Annals of The Carnegie Museum, in 1955, in volume 33, pages 347-386