TY - BOOK AU - Mehra,Jagdish AU - Rechenberg,Helmut TI - The Historical Development of Quantum Theory. (in 9 volumes) Volume 1; Part 2: The Quantum Theory of Planck, Einstein, Bohr, and Sommerfeld: Its Foundation and the Rise of Its Difficulties, 1900 - 1925 SN - 0387906673 PY - 1982/// CY - New York PB - Springer-Verlag ER -