TY  - BOOK
AU  - Sauer, Carl. O.
AU  - Thomas, William. L.
AU  - Mumford, Lewis
TI  - Mans role in changing the face of the earth # Mans role in changing the face of the earth  vol 2: Vol 2
SN  - 0-226-79605-1
U1  - 550:600 
PY  - 1956///
CY  - Chicago
ER  -