00931nam0-22003011i-450-9900010778904033210-08-017803-0000107789FED01000107789(Aleph)000107789FED0100010778920000920d1974----km-y0itay50------baengIntroduction to Gas LasersPopulation Inversion Mechanims with Emphasis on Selective Excitation Processesby Colin S. WillettOxford [etc.]Pergamon Press1974International series of monographs in natural philosophy67LaserElettronica quantistica537.2Willett,Colin Sidney334710ITUNINARICAUNIMARCBK99000107789040332127A-03114758FI1FI1Introduction to gas lasers117529UNINAING01