This Book in in the Public Domain to my knowledge

Title Drilling for placer gold 
Creator Gardner, Walter H 
Publisher Beaver, Falls, Pa. : Keystone Driller Company 
Date [192- ] 
Language eng 
Possible Copyright Status NOT_IN_COPYRIGHT 
Copyright Region US 
Copyright Evidence Evidence reported by ian frederick-rothwell for item drillingforplace00gardrich on March 2, 2007: no visible notice of copyright; exact publication date unknown. 
Copyright Evidence Date 20070302193650 
Contributor University of California Libraries 
Media Type texts 
Call Number nrlf_ucb:GLAD-151192117 
Identifier drillingforplace00gardrich 
Public Date 2007-03-02 11:37:32