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Beaver County's First Photography--Milestones Vol 9 No1 1
The Telelphone in Beaver County
Originated August 1879--Milestones
Vol 14 No 3
History of the Telephone in Beaver County--Milestones Vol 21 No 2
Oliver B. Shallenberger--Electrical Genius--Milestones Vol 21 No 2
Drill and Backhoe Invented in Beaver County--Milestones Vol 31 No. 2