TY  - BOOK
AU  - Clark,Thomas Henry
AU  - Stearn,Colin William
TI  - Geological evolution of North America
PY  - 1968///
CY  - New York
PB  - Ronald Press
KW  - Geology
KW  - North America
KW  - Paleontology
KW  - Geology, Stratigraphic
N1  - Includes bibliographical references
ER  -