Investigation of the Royal John Lead-zinc Deposits, Grant County, N. Mex

Investigation of the Royal John Lead-zinc Deposits, Grant County, N. Mex

In 1947 and 1948 the Royal John was re-examined by a Bureau engineer, and additional development to increase the reserves of low-grade lead-zinc ore was proposed. This project was started in August 1948 and completed in June 1949.
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