Ulke, T.
1893
Treatment of franklinite. The Mineral Industry, II,
673-675. *
Umpleby, J. B., Schaller, W. T., and Larsen, E.
S.
1913
Custerite, a new contact metamorphic mineral.
American Journal of Science, 4th Series, 36, 385-394.
Zeitschrift für Krystallographie und Mineralogie, 53,
321-331.
Ungemach, H.
1911
Über den Datolith. Zeitschrift für Krystallographie und
Mineralogie, 49, 459-476. *
Urban, J.
1978
One-locality minerals of at least a half a century.
Rocks and Minerals, 53, 10-13.
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