Service building. Cross section thru dry dock nos. 4 and 5 showing service bldg and 20-75-150 ton cranes (dry dock associates, May 23, 1941). In files of Cushman and Wakefield, building no. 501, Philadelphia Naval Business Center. - Naval Base Philadelphia-Philadelphia Naval Shipyard, Service Building, Dry Docks No. 4 and 5, League Island, Philadelphia, Philadelphia County, PA

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