Published in University of Kansas Science Bulletin, in 1950, in volume 33, pages 441-457

Published in University of Kansas Science Bulletin, in 1950, in volume 33, pages 459-480

Published in University of Kansas Science Bulletin, in 1950, in volume 33, pages 481-518

Published in University of Kansas Science Bulletin, in 1950, in volume 33, issue 8, pages 313-380

Published in Univ. Kansas Sci. Bull., in 1950, in volume 33, issue 14, pages 519-603