Macdougall, J. D <br/><br/>
Nature's clocks : how scientists measure the age of almost everything 
Doug Macdougall 
 - Berkeley  University of California Press  c2008 
 - xi, 271 p. : ill. ; 24 cm 
<br/><br/> Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9780520249752 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geochronometry<br/>Geological time<br/>Radioisotopes in geology
<br/><br/><label>Dewey Class. No.: </label>551.701 MAC