@conference{806231, author = {W Lee and John Lowe and Jon Shirley and Robert Drullinger}, title = {Microwave Leakage as a Source of Systematic Error and Long-Term Instability in Cesium Atomic Beam Frequency Standards}, year = {1994}, month = {1994-01-01 00:01:00}, publisher = {8^uth^ European Frequency and Time Forum , Weihenstephan, 1, GE}, language = {en}, }