Silverberg, Robert <br/><br/>
Clock for the ages:   how scientists date the past 

 - New York:  MacMillan,  1971. 
 - 238p.:  ill.;  21cm. 
<br/><br/>Includes bibliographical references 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Time
<br/><br/><label>LC Class. No.: </label>QB213.S53