Mining bureau  [An act authorizing the establishment of a Bureau for Mining the Precious Metals, and providing for its inauguration and support. 

 - Washington,  1869?] 
 - 26 p.  23 cm. 
<br/><br/><label>LCCN: </label>ca 11001096  
<br/><br/><label>LC Class. No.: </label>TN23  / .U75 1869