Published in Annals of The Carnegie Museum, in 1939, in volume 27, pages 121-128

Published in Annals of the Carnegie Museum, in 1939, in volume 27, pages 311-320

Published in Annals of The Carnegie Museum, in 1939, in volume 27, pages 321-348

Published in Annals of The Carnegie Museum, in 1939, in volume 27, pages 349-370