TY  - BOOK
AU  - Reisfeld Renata
AU  -  Jorgensen Christian K
TI  - Lasers and excited state of rare earth
T2  - Inorganic chemistry concepts; 1
U1  - C5:72:(E1921), L7 
PY  - 1977///
CY  - Berlin
PB  - Springer-Verlag         
KW  - Radiation
ER  -