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