TY - JOUR AU - Lee Kieffer AU - Gordon Dunn CY - Boulder DA - 1965-10 M1 - 51 PP - Boulder PY - 1965 SP - 1 EP - 140 TI - Electron Impact Ionization Cross Section Data for Atoms, Atomic Ions and Diatomic Molecules: I. Experimental Data SN - 51 ER -