TY  - BOOK
AU  - Willett,Colin S.
TI  - Introduction to gas lasers: population inversion mechanisms 
SN  - 0080178030 :
U1  - 621.3663 
PY  - 1974///
CY  - Oxford
PB  - Pergamon Press
KW  - Gas lasers
N1  - Includes index; With emphasis on selective excitation processes
ER  -