Wikimedi'Òc

GULF AND ARCO REFINERIES- - NARA - 549959.jpg - US National Archives bot

GULF REFINERY-FROM THE PENROSE BRIDGE - NARA - 549960.jpg - US National Archives bot

GULF AND ARCO PLANTS- - NARA - 549975.jpg - US National Archives bot

Preparation for War to defend Commerce Birch's Views Plate 29.jpg - BoringHistoryGuy

Centennial-5-1838-F-125 (3003750740).jpg - Fæ

Airplanes - Miscellaneous - Airplanes and parts manufactured for government use. Laying of keel at Naval Aircraft Factory, Philadelphia, PA - NARA - 17341386.jpg - US National Archives bot

West Philadela. starch works LCCN2016649106.tif - Fæ

Maintenance Hole Cover KT (DSC 2590).jpg - N-gio

Front Page Morris Tasker and Co Illustrated Catalogue (1871).jpg - N-gio

Argyrol & Ovoferrin ("American medical directory", 1906 advert).png - Rosiestep