Geology of the Gold-pyrite Belt of the Northeastern Piedmont, Virginia John Tipton Lonsdale Published: 1927 Total Pages: 148 Get eBook
Geology of the Gold-Pyrite Belt of the Northeastern Piedmont Virginia John Tipton Lonsdale Published: 1927 Total Pages: Get eBook
Geological Series, Bulletin Virginia. Division of Mineral Resources Published: 1927 Total Pages: 1190 Get eBook
Report of the State Geologist California. Division of Mines and Geology Published: 1928 Total Pages: 1114 Get eBook
Chapter of Report ... of the State Mineralogist Covering Mining in California and the Activities of the State Mining Bureau Published: 1928 Total Pages: 434 Get eBook
