TY - JOUR AU - Lewis Branscomb BT - Physical Review Letters ( Physics of Electronic and Atomic Collisions. Invited Papers for the Fifth International Conference, Leningrad July, 1967 N1 - JILA Pub. 403 PY - 1968 SP - 12 EP - 31 T2 - Physical Review Letters ( Physics of Electronic and Atomic Collisions. Invited Papers for the Fifth International Conference, Leningrad July, 1967 TI - The Role of Atomic Collision Processes in Astrophysics ER -