Não informado. (1948). Mineral Information Service. California Division of Mines and Geology.
Chicago-Zitierstil (17. Ausg.)Não informado. Mineral Information Service. Sacramento, Calif: California Division of Mines and Geology, 1948.
MLA-Zitierstil (8. Ausg.)Não informado. Mineral Information Service. California Division of Mines and Geology, 1948.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.