Andrews, Robert E., creatorAyde, E. F.Shows the Au Sable River, lakes, railroad lines, railroad stops, roads, and camping sites. Traced by E.F. Ayde, revised by R.E. Andrews. Robert E. Andrews, Water Office Detroit, Mich. Negative blueprint copy. 1 map; 57 x 72 cmJPEG49bc3225-89a5-4170-a8eb-19e7fadae5faengPublicRailroadsMap of Au Sable River; traced by E.F Ayde; revised by R.E Andrews.MapsMichigan--Au Sable National Scenic RiverMichiganUniversity of Michigan