Geology And Ore Deposits Of The Philipsburg Quadrangle, Montana, Issue 78William H. Emmons, Frank C. Calkins · First published 2018Open the Tome
Outline of the geology of the Comstock Lode district, NevadaFrank C. Calkins · First published 1944Open the Tome
Geology and ore deposits of the Cottonwood-American Fork Area, UtahFrank C. Calkins · First published 1943Open the Tome
A geological reconnaissance in northern Idaho and northwestern MontanaFrank C. Calkins · First published 1909Open the Tome
Snoqualmie folio, WashingtonGeorge Otis Smith, Frank C. Calkins, Geological Survey (U.S.) · First published 1906Open the Tome
Geology and water resources of a portion of east-central WashingtonFrank C. Calkins · First published 1905Open the Tome
A contribution to the petrography of the John Day BasinFrank C. Calkins · First published 1902Open the Tome
