Resource Type
Counties
2 Matching Results
Results open in a new window/tab.
Results:
1 - 2 of
2
Investigation of West Belt Copper-Zinc Mines, El Dorado, Amador, Calaveras, and Mariposa Counties, California
Report issued by the U.S. Bureau of Mines on the West Belt copper-zinc mines. The properties and characteristics of the mineral composition are presented. The report includes tables and maps.
Date:
February 1951
Creator:
Wiebelt, Frank J.; Sanborn, W. C.; Trengove, R. R. & Ricker, Spangler
System:
The UNT Digital Library
Control of Hookworm Infection at the Deep Gold Mines of the Mother Lode, California
From Introduction: "This report presents of an investigation of hookworm infection in the deep gold mines of the Mother Lode, California. In this investigation 1,440 miners of Mother Lode have been examined for hookworm infection; 444 miners were found to be infected; and 91 miners have taken the treatment and have gotten rid of the infection."
Date:
1917
Creator:
Cumming, James G. & White, Joseph H.
System:
The UNT Digital Library