Published in Proceedings of the California Academy of Sciences, in 1932, in volume 20, pages 161-263

Published in Proc. Calif. Acad. Sci, in 1932, in volume 20, pages 265-67

Published in Proceedings of the California Academy of Sciences, in 1932, in volume 20, pages 269-290

Published in Proceedings of the California Academy of Sciences, in 1932, in volume 20, pages 291-465