Published in Proceedings of the California Academy of Sciences, in 1992, in volume 47, pages 303-328

Published in Proc. Calif. Acad. Sci, in 1992, in volume 47, pages 329-337

Published in Proceedings of the California Academy of Sciences, in 1992, in volume 48, issue 1, pages 1-25

Published in Proceedings of the California Academy of Sciences, in 1992, in volume 48, issue 2, pages 27-95

Published in Proceedings of the California Academy of Sciences, in 1992, in volume 48, issue 3, pages 97-108