Clark, Ian D.  1954- <br/><br/>
Environmental isotopes in hydrogeology / 
Ian D. Clark and Peter Fritz 
 - Boca Raton :  Lewis publishers,  1997 
 - 328 p. :  ill. ;  25 cm. 
<br/><br/><label>ISBN: </label>1566702496  RM327.69 
<br/><br/><label>LCCN: </label>97-021889 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Radioactive tracers in hdrogeology