TY  - BOOK
AU  - Macdougall, J. D
TI  - Nature's clocks : how scientists measure the age of almost everything
SN  - 9780520249752
U1  - 551.701 MAC 
PY  - 2008///
CY  - Berkeley
PB  - University of California Press
KW  - Geochronometry
KW  - Geological time
KW  - Radioisotopes in geology
N1  - Includes bibliographical references and index
ER  -