TY  - BOOK
AU  - Clark,Sydney P.
AU  - Donnelly,Thomas w.
AU  - O'Keefe,John A.
TI  - The earth sciences: problems and progress in current research 
AV  - QE40 .D6
PY  - 1963///
CY  - Chicago
PB  - The University of Chicago Press
KW  - Geology
N1  - Includes bibliographical references and index
ER  -