TY - CHAP AU - Unertl, W AU - Celotta, Robert AU - Pierce, Daniel C2 - Electron Diffraction 1927-1977, Institute of Physics, Philadephia, PA DA - 1978-01-01 00:01:00 LA - en PB - Electron Diffraction 1927-1977, Institute of Physics, Philadephia, PA PY - 1978 TI - Polarized LEED Using a GaAs Spin Polarized Electron Source ER -