Proceedings of a conference on site explorartion in rock for underground design and construction :  held March 29-31, 1978, at Alexandria, Virginia 

 - Washington :  United States Government Printing Office,  1979 
 - Various pagings :  ill. ;  28 cm. 
<br/><br/> Report no. FHWA-TS-79-221 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Underground disposal<br/>Design and construction
<br/><br/><label>Dewey Class. No.: </label>363.728