Allentown, Pa. . 1 map on 117 sheets : col. ; sheets 64 x 54 cm. + title sheet, index sheet, and key sheet + 8 ""skeleton"" overlay sheets. Oriented with north slightly to the right; Accompanied by: Map of congested district of Allentown, PA; Includes text, indexes to streets and special interest points, adjoining sheets index map, and map key; Maps Library copy is encapsulated. Scale approximately 1:600. 50 ft. to an in.