Chen-Ning Franklin Yang Autograph Erna Sack shows Didier Queloz in a

shows Didier Queloz in a close-up portrait

shows Howard Jones in a close-up portrait

mostly signed in blue ink

Autograph subscription signed

shows Gordon Brown in a chest-up portrait

Chen-Ning Franklin Yang Autograph Erna Sack shows Didier Queloz in aPrinted scientific article signed, three pages, 8 x 10,5 inch, scientific article entitled `Condition of Self Duality for SU(2) Gauge Fields on Euclidean Four Dimensional Space` by C. N. Yang reprint from `Physical Review Letters` (Vol. 38, 13 June 1977, No. 24), signed and inscribed on the front page in black felt tip "from the author C. N. Y.", with very mild signs of wear in nearly very fine condition.