Source:Squirrel-hill-aerial-1956
From Pittsburgh Streets
Aerial photograph APS-2R-91. 1956. https://www.pasda.psu.edu/pennpilot/era1960/allegheny_1956/allegheny_1956_photos_jpg_800/allegheny_092156_aps_2r_91.jpg; https://www.pasda.psu.edu/pennpilot/era1960/allegheny_1956/allegheny_1956_photos_tif/allegheny_092156_aps_2r_91.tif; included in the 1957 layer at Pittsburgh Historic Maps (https://esriurl.com/pittsburgh).
