1. Maine, transportation map, highways, railroads, canals, air lanes, and dredged channels; highways corrected to Feb. 1, 1939. Scale 1:250,000 approximately 1 in.=4 m. Revised edition, 1940. Bookmark Corporate/Agency Authors: Public Roads Bureau and Agriculture Department Publisher: Public Roads Bureau Date: 1940 SuDoc number: A 22.9/2:M 28/sh.1-6/940