Dalrymple, G. Brent, <br/><br/>
Potassium-argon dating :  principles, techniques and applications to geochronology / 
G. Brent Dalrymple and Marvin A. Lanphere. 
 - San Francisco :  W.H. Freeman,  1969. 
 - 258 p. :  ill. ;  25 cm. 
<br/><br/>Bibliography: p.227-240 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Potassium--Argon dating.