Published in Proc. Calif. Acad. Sci. (4), in 1957, in volume 29, pages 21-46

Published in Proc. Calif. Acad. Sci. (4), in 1957, in volume 29, pages 87-146

Published in Proceedings of the California Academy of Sciences, in 1957, in volume 29, pages 147-256

Published in Proceedings of the California Academy of Sciences, in 1957, in volume 29, issue 3, pages 47-86