WILLETT, Colin S. Introduction to gas lasers : population inversion mechanisms with emphasis on selective excitation processes / [by] Colin S.Willett - Oxford Pergamon press 1974 - xiv, 528 p. Includes references, appendixes and index. ISBN: 80178030 Subjects--Topical Terms: LasersGas lasers Dewey Class. No.: 621.366 / WIL