Published in Bulletin Southern California Academy of Sciences, in 1949, in volume 48, pages 1-4

Published in Bulletin of The Southern California Academy of Sciences, in 1949, in volume 48, pages 7-12

Published in Bulletin of The Southern California Academy of Sciences, in 1949, in volume 48, pages 13-18

Published in Bulletin of The Southern California Academy of Sciences, in 1949, in volume 48, pages 41-45

Published in Bulletin of The Southern California Academy of Sciences, in 1949, in volume 48, pages 47-54

Published in Bulletin of The Southern California Academy of Sciences, in 1949, in volume 48, pages 55-70