1. Catanzaro , E. J. A study of discordant zircons from the Little Belt (Montana), Beartooth (Montana), and Santa Catalina (Arizona) mountains New York 1962
2. Dating of the Precambrian of the Minnesota River valley, Minnesota (abstract);Goldich;J. Geophys. Res.,1962
3. Goldich , S. S. A. O. Nier H. Baadsgaard J. H. Hoffman H. W. Krueger The Precambrian geology and geochronology of Minnesota Minnesota Geol. Survey Bull 41 1961
4. Igneous and metamorphic rocks of the Minnesota River valley;Lund;Bull. Geol. Soc. Am.,1956
5. The architectural and structural stones of Minnesota;Thiel;Minnesota Geol. Survey Bull.,1935