Allentown, Pa. . 1 map on 24 sheets : col. ; sheets 64 x 54 cm. + Title sheet (64 x 54 cm.). Title from title sheet; Oriented with north slightly to the right; Includes text, adjoining sheets key map, and key; Street and special points indexes on title sheet; Maps Library set is encapsulated. Scale approximately 1:600. 50 ft. to an in.