TY - RPRT TI - Precision spectroscopy, diode lasers, and optical frequency measurement technology : selected publications of the Optical Frequency Measurement Group of the Time and Frequency Division AU - Hollberg, Leo PY - 1998 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS TN 1504 DO - 10.6028/NIST.TN.1504 ER -