TY  - BOOK
AU  - Willett,Colin S.
TI  - Introduction to gas lasers: population inversion mechanisms, with emphasis on selective excitation processes 
T2  - International series of monographs in natural philosophy
SN  - 0080178030
PY  - 1974///
CY  - Oxford
PB  - Pergamon Press
KW  - Gas lasers
ER  -