Hanna, K. <br/><br/>
Coal mine entry intersection behavior study / 
by K. Hanna, D. Conover, and K. Haramy. 
 - Washington, DC :  United States Dept. of the Interior, Bureau of Mines,  1990. 
 - iii, 78 p. :  ill. 
 - Report of investigations ;  9337 .
 - Report of investigations (United States. Bureau of Mines) ;  9337 .
<br/><br/><label>LCCN: </label>90002477  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Shaft sinking.<br/>Rock mechanics.