(John Joseph, American electrical engineer, 1861-1932) Autograph technical notes with drawings, 12 sheets, v.s., in pencil, n.d.; and a printed booklet on Carty, v.s., v.d. (13 pieces).
(John Joseph, American electrical engineer, 1861-1932) Autograph technical notes with drawings, 12 sheets, v.s., in pencil, n.d.; and a printed booklet on Carty, v.s., v.d. (13 pieces).
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