Answer | Crossword Clue |
---|---|
OREGON | The Columbia River forms much of its northern border |
ORE | The Columbia R. forms much of its northern border |
PERU | The Putumayo River forms part of its northern border |
ORE | The Columbia R. forms part of its border |
ONTARIO | The Detroit River forms part of its border |
IOWA | The Big Sioux River forms part of its border |