Chen-Ning Franklin Yang Autograph Erna Sack signed and dated in dark

signed and dated in dark ink "Miguel Angel Asturias - Prix Nobel - 1967"

shows Gordon Brown in a chest-up portrait

mostly signed in blue ink

shows Didier Queloz in a close-up portrait

Signed card - with typed description (in German - covered by the passepartout)

Chen-Ning Franklin Yang Autograph Erna Sack signed and dated in darkPrinted 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.