TY - JOUR AU - Michael Kelley AU - W Rogers AU - Robert Celotta AU - S Mielczarek C2 - Physical Review Letters DA - 1983-01-01 00:01:00 LA - en M1 - 51 PB - Physical Review Letters PY - 1983 TI - Near-Threshold Measurements of the Spin Dependence of Electron-Impact Ionization ER -