TY  - BOOK
AU  - Townes C H
AU  -  Schawlow A L
TI  - Microwave spectroscopy
T2  - Dover books on physics
U1  - C57:3, J5;L5 
PY  - 1975///
CY  - New York    
PB  -  Dover Publications       
KW  - Radiations
ER  -