The Physics of Electronic and Atomic Collisions. Invited papers from the Fifth International Conference, Leningrad. Lewis M. Branscomb, Ed. Published by the Joint Institute for Laboratory Astrophysics, Boulder, Colo., 1968.
Proceedings of a Symposium Held at the Joint Institute for Laboratory Astrophysics, University of Colorado, Boulder, Colorado, JUNE 10-14, 1968
Proceedings Of A Symposium Held At The Joint Institute For Laboratory Astrophysics, University Of Colorado, Boulder, Colorado, June 10-14, 1968(NBS, Boulder, Colorado, 1968), p. 286.