Webster, D. S. <br/><br/>
Two-well tracer test in fractured crystalline rock / 
by D. S. Webster, J. F. Proctor and I. W. Marine. 
 - Washington:   United States Government Printing Office,   1970.  
 - iv, I22 p. :  ill., tables ;  23 cm. 
 -  1544 General Ground-water TechniquesChapter I .
<br/><br/> Work done in cooperation with the U. S. Atomic Energy Commission. 
<br/><br/>Includes bibliographical references (p. I22). 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hydrology--Radioisotopes
<br/><br/><label>Dewey Class. No.: </label>539.752