Published in Proceedings of the California Academy of Sciences, in 1937, in volume 22, pages 159-178

Published in Proceedings of the California Academy of Sciences, in 1937, in volume 22, pages 111-126

Published in Proceedings of the California Academy of Sciences, in 1937, in volume 22, pages 65-98

Published in Proceedings of the California Academy of Sciences, in 1937, in volume 22, pages 99-110

Published in Proceedings of the California Academy of Sciences, in 1937, in volume 22, pages 127-158

Published in Proceedings of the California Academy of Sciences, in 1937, in volume 23, pages 115-169

Published in Proceedings of the California Academy of Sciences, in 1937, in volume 23, pages 99-114

Published in Proc. California Acad. Sci., in 1937, in volume 23, issue 8, pages 99-114

Published in Proceedings of the California Academy of Sciences, 4th Series, in 1937, in volume 23, pages 175-190