The Country Parson's Advice to His ParishionersGeorge B. Koch · First published 1998 · Latest edition 2006Open the Tome
Geological problem solving with LOTUS 1-2-3 for exploration and mining geologyGeorge S. Koch · First published 1990Open the Tome
Exploration-geochemical data analysis with the IBM PCGeorge S. Koch · First published 1987Open the Tome
Statistical analysis of geological dataGeorge S. Koch · First published 1970 · Latest edition 1980Open the Tome
The anomalous reactions in Kolbe electrosynthesisGeorge Karel Koch · First published 1967Open the Tome
Lode mines of the central part of the Granite mining district, Grant County, OregonGeorge S Koch · First published 1959Open the Tome