Reisfeld Renata Lasers and excited state of rare earth Reisfeld Renata; Jorgensen Christian K - Berlin Springer-Verlag 1977 - viii,226p. cm. ill - Inorganic chemistry concepts; 1 . Standard No.: 26842 Source: Textual Subjects--Topical Terms: Radiation Dewey Class. No.: C5:72:(E1921), L7