Published in Proceedings of the California Academy of Sciences, in 1930, in volume 18, pages 531-541
Published in Proceedings of the California Academy of Sciences, in 1930, in volume 18, pages 542-586
Published in Proceedings of the California Academy of Sciences, in 1930, in volume 19, pages 1-6
Published in Proceedings of the California Academy of Sciences, in 1930, in volume 19, pages 7-12
Published in Proceedings of the California Academy of Sciences, in 1930, in volume 19, pages 13-22
Published in Proceedings of the California Academy of Sciences, in 1930, in volume 19, pages 23-40
Published in Proceedings of the California Academy of Sciences, in 1930, in volume 19, pages 41-56
Published in Proceedings of the California Academy of Sciences, in 1930, in volume 19, pages 57-64
Published in Proceedings of the California Academy of Sciences, in 1930, in volume 19, pages 65-83
Published in Proceedings of the California Academy of Sciences, in 1930, in volume 19, pages 95-104
Published in Proceedings of the California Academy of Sciences, in 1930, in volume 19, pages 105-108
Published in Proceedings of the California Academy of Sciences, in 1930, in volume 19, pages 109-215
Published in Proceedings of the California Academy of Sciences, in 1930, in volume 19, issue 8, pages 85-93