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Drilling for placer gold

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Drilling for placer gold  Empty Drilling for placer gold

Post  Guest Tue Mar 26, 2013 1:32 pm

Drilling for placer gold 
compiled by Walter H. Gardner
Published 1920 
http://ia700304.us.archive.org/34/items/drillingforplace00gardrich/drillingforplace00gardrich.pdf

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