http://pec.lib.wvu.edu/record/P42881974The Explosives engineer. Serial. Printed Ephemera Collection has: 1974:spring. Issue for spring 1974 includes article: Shooting a smooth-face toehold for a giant span, by Steve Repola. Explosives--Periodicals.Bridges--Design and construction--West Virginia--New River Gorge. New River Gorge Bridge (W. Va.)Blasting--Periodicals.14256