Published in Annals of the Carnegie Museum, in 1950, in volume 31, pages 89-238

Published in Annals of The Carnegie Museum, in 1950, in volume 31, pages 297-298

Published in Annals of The Carnegie Museum, in 1950, in volume 31, pages 299-320

Published in Annals of the Carnegie Museum, in 1950, in volume 31, pages 321-330

Published in Annals of The Carnegie Museum, in 1950, in volume 31, pages 333-334

Published in Annals of The Carnegie Museum, in 1950, in volume 31, pages 335-358

Published in Annals of the Carnegie Museum, in 1950, in volume 31, issue 12, pages 289-297