TY  - MPI
TI  - Ohio Valley
T2  - The making of America
VL  - 10
PY  - 1985///
CY  - Washington (DC)
PB  - National Geographic Society
KW  - Cartografia
KW  - 912=111
SP  - 1 mapa color.
PP  - Washington (DC)
PB  - National Geographic Society
ER  -