Bear, J. <br/><br/>
Physical principles of water percolation and seepage / 
by J. Bear ; S. Irmay (editor). 
 - Paris :  Unesco,  c1968. 
 - 465 p. :  ill. ;  24 cm. 
 - Arid zone research ; XXIX .
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Percolation.<br/>Seepage.<br/>Water--Filtration.