Published in Bulletin of The Southern California Academy of Sciences, in 1957, in volume 56, pages 47-49

Published in Bulletin of The Southern California Academy of Sciences, in 1957, in volume 56, pages 85-87

Published in Bulletin of The Southern California Academy of Sciences, in 1957, in volume 56, pages 130-132

Published in Bulletin of the Southern California Academy of Sciences, in 1957, in volume 56, issue 1, pages 14-20