References cited in the map unit descriptions.

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Clark, S.L., 1979, Structural and petrological comparison of the southern Sapphire Range, Montana, with the northeast border zone of the Idaho Batholith: Kalamazoo, Western Michigan University, M.S. thesis, 88 p., scale 1:49,000.
Clough, A.H., 1981, Geology of the NE 1/4 of the Calder 15' quadrangle, Shoshone County, Idaho: Moscow, Idaho, University of Idaho, M.S. thesis, 105 p., scale 1:24,000.
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Cobban, W.A., 1955, Cretaceous rocks of northwestern Montana: Billings Geological Society, 6th Annual Field Conference Guidebook, 1955, p. 107-119.
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