RITCHEY, Joseph. <br/><br/>
Subsurface fluid - Flow ( ground - Water and Vadose Zone ) Modeling 

 - USA  West Conshohocken : ASTM  1996 
 - xii, 424 P 
<br/><br/><label>ISBN: </label>0-8031-2021-4 
<br/><br/><label>Dewey Class. No.: </label>551.49