Federal Lithograph Company.Federal new numbering system pocket map of Detroit Panel title: Federal official pocket map of Detroit and environs. Oriented with north to the upper right. Includes advertising for Frischkorn Real Estate Co. Street index on verso. 1 map: col.; 40 x 60 cm. folded to 22 x 10 cm.JPEG71347a1b-537c-4218-baed-615233503120engPublicFederal new numbering system map of Detroit and environs: showing all streets and changes, new car lines, etc.MapsMichigan--DetroitMichigan1920University of Michigan