1. Sulfur [frasch and recovered]; prepared in Division of Nonmetallic Minerals, Bookmark SuDoc number: I 28.63:(date)
2. Sulfur [frasch and recovered]; prepared in Division of Nonmetallic Minerals. Bookmark SuDoc number: I 28.63:(date)
7. Sulfur [native and recovered]; prepared in Division of Nonmetallic Minerals. Bookmark SuDoc number: I 28.63:(date)