Published in Proceedings of the California Academy of Sciences, in 1971, in volume 37, pages 489-500

Published in Proceedings of the California Academy of Sciences, in 1971, in volume 37, pages 509-513

Published in Proceedings of the California Academy of Sciences, in 1971, in volume 37, pages 515-527

Published in Proceedings of the California Academy of Sciences, in 1971, in volume 37, pages 529-535

Published in Proceedings of the California Academy of Sciences, in 1971, in volume 37, pages 537-566

Published in Proceedings of the California Academy of Sciences, in 1971, in volume 37, pages 567-574

Published in Proceedings of the California Academy of Sciences, in 1971, in volume 37, pages 575-584

Published in Proceedings of the California Academy of Sciences, in 1971, in volume 37, issue 17, pages 501-508