Pomeroy's mining manual for prospectors, miners and schools :
Pomeroy's mining manual for prospectors, miners and schools : Showing where and how to search for gold and silver mines, and to make tests /
Ed. by Henry r. pomeroy
- 3 # ed, re-arrenged, rev. and enl.
- 119 páginas
Prospección
TN271.G6 / P65 1881
Prospección
TN271.G6 / P65 1881