[3 offprints, including:] Symmetrization Postulate and Its Experimental Foundation.

New York:: Physical Review, 1964., 1964. 3 offprints. Original self-printed wrappers. Very good. INVENTORY: GREENBERG, O. W. GREENBERG, O. W.; Messiah, A. M. L. Symmetrization Postulate and Its Experimental Foundation. Offprint from: The Physical Review, Vol. 136, No. 1B, B 248-B267, 12 October 1964. GREENBERG, O. W. Coupling of Internal and Space-Time Symmetries. Offprint from: The Physical Review, Vol. 135, No. 6B, B1447-B1450, 21 September 1964. GREENBERG, O. W. Magnetic Moments of Spin 1/2 Particles in External Fields. Offprint from: Physics Letters, Volume 19, number 5, 2 pp., 15 November 1965. Greenberg was an American physicist, professor at University (truncated) of Maryland, Dept. of Physics & Astronomy, and Rockefeller University. Greenberg posited the existence of a hidden, 3-valued charge, called color charge, of subatomic particles, "quarks,"' in 1964, the same year that quarks were posited as constituents of hadrons by Murray Gell-Mann and, independently, by George Zweig. (Inventory #: SS13267)