woodandwater:
Isle Royale Topographic Map 1957
woodandwater:
Isle Royale Post Glacial Report
woodandwater:
Isle Royale Post Glacial Report-Map
woodandwater:
Keweenaw Bay-Geological Map 1847
woodandwater:
Side by side
woodandwater:
Michigan-1869
woodandwater:
Grand Rapids MI-1887
woodandwater:
Isle Royale Map 1957
woodandwater:
Isle Royale Map 1957