found: Work cat.: Brose, David S. The archaeology of Summer Island, 1970.
found: Brose, David S. The Summer Island site, 1970:p. 5 (Summer Island lies about three miles south of Point Detour and is northernmost in the island chain between Michigan's Garden Peninsula and Wisconsin's Door Peninsula, separating Green Bay and Bay de Noc from Lake Michigan)
found: GNIS, Feb. 15, 2007:(Summer Island, island, Delta County, Michigan, 45°33ʹ48ʺN, 086°38ʹ11ʺW)
found: Web. geog.(Summer Island, island, Delta co. S Upper Penin. of Michigan in N Lake Michigan at N entrance to Green Bay)
notfound: Col. gaz.