Engineering methods for the design and employment of wood cribs / 
by Thomas M. Barczak and David F. Gearhart. 
 - Avondale, Md. :  U.S. Dept. of the Interior, Bureau of Mines,  1993. 
 - 34 p. 
 - Information circular ;  9361 .
 - Information circular (United States. Bureau of Mines) ;  9361 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mines and mineral resources.<br/>Mine timbering--Design and construction.<br/>Mine timbering--Testing.