Published in Bulletin of The Southern California Academy of Sciences, in 1956, in volume 55, pages 7-13

Published in Bulletin of the Southern California Academy of Sciences, in 1956, in volume 55, pages 14-17

Published in Bulletin of the Southern California Academy of Sciences, in 1956, in volume 55, pages 44-46

Published in Bulletin of The Southern California Academy of Sciences, in 1956, in volume 55, pages 107-110

Published in Bulletin of The Southern California Academy of Sciences, in 1956, in volume 55, pages 131-144

Published in Bulletin of The Southern California Academy of Sciences, in 1956, in volume 55, pages 145-149