Hackett, O. M.  1920- <br/><br/>
Ground-water research in the United States / 
by O. M. Hackett. 
 - Washington :  U.S. Govt. Print. Off.,  1966. 
 - 8 p. ;  27 cm. 
 - Geological Survey circular ;  527 .
<br/><br/>Bibliography: p. 7-8. 
<br/><br/><label>LCCN: </label>gs 66000294  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water-supply--United States.<br/>Groundwater--United States.
<br/><br/><label>LC Class. No.: </label>QE75  / .C5 no. 527 
<br/><br/><label>Dewey Class. No.: </label>551.4/9/0973