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	1.	No cover image available Tectonic sifnificance of an Early Proterozoic two-province boundary in central Arizona by Karlstrom, Karl Bowring, Samuel Conway, Clay Material type: Article; Format: print Language: Eng In: Geological Society of America bulletin 99(4), 1987, p. 529-538: : ill., carte, graph., tab., rés.(Angl) Availability: No items available.
	2.	No cover image available Structure and chronology of the Oval Peak batholith and adjacent rocks : implications for the Ross Lake fault zone, North Cascades, Washington by Miller, Robert Bowring, Samuel Material type: Article; Format: print Language: Eng In: Geological Society of America bulletin 102(10), 1990, p. 1361-1377: : ill., carte, graph., tab., rés.(Angl) Availability: No items available.
	3.	No cover image available U-Pb geochronologic constraints on the paleoproterozoic crustal evolution of the upper granite gorge, Grand Canyon, Arizona by Hawkins, David Bowring, Samuel Ilg, Bradley Karlstrom, Karl Williams, Michael Material type: Article; Format: print Language: Eng In: Geological Society of America bulletin 108(9), 1996, p. 1167-1181: : carte, graph., tab., rés.(Angl) Availability: No items available.

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