Map of Carroll County, Md., showing rural delivery service
Road map showing rural postal delivery routes and landholders' surnames at delivery points. Also covers small areas of adjoining counties in Md. and Pa. "January 31, 1911 G.C.M." Blue-line print. Available also through the Library of Congress Web site as a raster image. Includes index of rural delivery routes and names of post offices providing rural delivery. "147."
United States. Post Office Department