(SCIENTISTS.) Group of 3 autographed items by 20th century scientists Format varies. Each framed. Vp, vd E300/400 William Shockley. Photograph Signed, "W=Shockley," with a drawing of a tran-sistor, approximately 6x4.5 inches. Np, nd * Edward Teller.

(SCIENTISTS.) Group of 3 autographed items by 20th century scientists Format varies. Each framed. Vp, vd E300/400 William Shockley. Photograph Signed, "W=Shockley," with a drawing of a tran-sistor, approximately 6x4.5 inches. Np, nd * Edward Teller. Photograph Signed, approximately 3.25 x 2.5 inch portrait. Np, nd * William Lawrence Bragg. TLS, "W L Bragg," to Dr. Ancell. 1.25 pages, air mail sheet. London, 7 January 1971.