Published in Bulletin of The Southern California Academy of Sciences, in 1939, in volume 38, pages 98-111

Published in Bulletin of The Southern California Academy of Sciences, in 1939, in volume 38, pages 43-53

Published in Bulletin of The Southern California Academy of Sciences, in 1939, in volume 37, pages 137-140

Published in Bulletin of The Southern California Academy of Sciences, in 1939, in volume 37, pages 129-132

Published in Bulletin of The Southern California Academy of Sciences, in 1939, in volume 38, pages 112-119

Published in Bulletin of The Southern California Academy of Sciences, in 1939, in volume 38, pages 20-26

Published in Bulletin of The Southern California Academy of Sciences, in 1939, in volume 37, pages 133-136

Published in Bulletin of The Southern California Academy of Sciences, in 1939, in volume 37, pages 101-104

Published in Bulletin of The Southern California Academy of Sciences, in 1939, in volume 38, pages 124-127

Published in Bulletin of The Southern California Academy of Sciences, in 1939, in volume 38, pages 57-62

Published in Bulletin of The Southern California Academy of Sciences, in 1939, in volume 38, pages 14-16