TY  - BOOK
AU  - Zen,E-an
TI  - Studies of appalachian geology: northern and maritime
PY  - 1968///
CY  - New York
PB  - Interscience Publishers
KW  - Billings, Marland Pratt, 1902.
KW  - Geology
KW  - Appalachian Mountains
N1  - Includes bibliographies
ER  -