Duvall, Wilbur I. <br/><br/>
Least squares calculation of horizontal stress from more than three diametral deformations in vertical boreholes / 
by Wilbur I. Duvall and James R. Aggson. 
 - [Washington] :  Dept. of the Interior, Bureau of Mines,  1980 [i.e. 1979] 
 - 12 p. 
 - Report of investigations ;  8414 .
 - United States.  Bureau of Mines.  Report of investigations ;  8414 .
 - Report of investigations (United States. Bureau of Mines) ;  8414. .
<br/><br/><label>LCCN: </label>79607970  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rock mechanics--Statistical methods.<br/>Least squares.<br/>Boring.