Media type: E-Article Title: On Astrophyllite, Arfvedsonite, and Zircon Published: Academy of Natural Sciences of Philadelphia, 1877 Published in: Proceedings of the Academy of Natural Sciences of Philadelphia, 29 (1877), Seite 9-11 Language: English ISSN: 1938-5293; 0097-3157 Origination: Footnote: Access State: Open Access