Chen-Ning Franklin Yang Autograph Erna Sack signed on the front cover

signed on the front cover in silver felt tip

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

shows Howard Jones in a close-up portrait

shows Robert Stolz as conductor

Chen-Ning Franklin Yang Autograph Erna Sack signed on the front coverPrinted 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.