Altoona, Pa. [1909]. 1 map on 100 sheets : col. ; on sheets 64 x 54 cm. Oriented with north to the upper right; ""Corrected to 1909""; Sheet 1 on verso of key sheet; Title from upper right corner of key sheet; Includes text, key sheet and Altoona key map on key sheet; Maps Library set includes additional skeleton sheets for sheet numbers 27-30; Maps Library copy is encapsulated. Scale not noted.