Published in Annals of the Carnegie Museum, in 1961, in volume 36, pages 1-4

Published in Annals of the Carnegie Museum, in 1961, in volume 36, pages 19-28

Published in Annals of the Carnegie Museum, in 1961, in volume 36, pages 49-62

Published in Annals of the Carnegie Museum, in 1961, in volume 36, pages 63-66

Published in Annals of the Carnegie Museum, in 1961, in volume 36, pages 69-76

Published in Annals of the Carnegie Museum, in 1961, in volume 36, issue 2, pages 5-18