TY  - BOOK
AU  - Ogburn,Charlton
TI  - The forging of our continent
T2  - The Smithsonian library
AV  - QE71 .O35
U1  - 557.3 
PY  - 1968///]
CY  - [New York]
PB  - American Heritage Pub. Co.; distribution by Van Nostrand
KW  - Geology
KW  - North America
KW  - Local
N1  - Part of the illustrated matter is colored; Bibliography: p. 155
ER  -