Published in Annals of The Carnegie Museum, in 1958, in volume 35, pages 69-76

Published in Annals of the Carnegie Museum, in 1958, in volume 35, pages 77-116

Published in Annals of the Carnegie Museum, in 1958, in volume 35, pages 117-125

Published in Annals of the Carnegie Museum, in 1958, in volume 35, issue 3, pages 27-36