Mullens, T. E. (1979). Stratigraphy, petrology, and some fossil data of the Roberts Mountains formation, north-central Nevada. Dept. of the Interior, Geological Survey.
Lua i Stíl Chicago (17ú heag.)Mullens, Thomas E. Stratigraphy, Petrology, and Some Fossil Data of the Roberts Mountains Formation, North-central Nevada. [Reston, Va.]: Dept. of the Interior, Geological Survey, 1979.
Lua MLA (9ú heag.)Mullens, Thomas E. Stratigraphy, Petrology, and Some Fossil Data of the Roberts Mountains Formation, North-central Nevada. Dept. of the Interior, Geological Survey, 1979.
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