Published in Annals of The Carnegie Museum, in 1931, in volume 20, pages 61-160

Published in Annals of the Carnegie Museum, in 1931, in volume 20, pages 161-167

Published in Annals of The Carnegie Museum, in 1931, in volume 20, pages 271-273

Published in Annals of the Carnegie Museum, in 1931, in volume 20, pages 279-292

Published in Annals of the Carnegie Museum, in 1931, in volume 20, pages 307-312

Published in Annals of The Carnegie Museum, in 1931, in volume 20, pages 333-339

Published in Annals of The Carnegie Museum, in 1931, in volume 20, pages 341-354

Published in Annals of the Carnegie Museum, in 1931, in volume 20, issue 2, pages 179-253

Published in Annals of The Carnegie Museum, in 1931, in volume 21, pages 43-66

Published in Annals of the Carnegie Museum, in 1931, in volume 21, issue 1, pages 11-42