@conference{805781, author = {W Lee and Jon Shirley and F Walls and Robert Drullinger}, title = {Systematic Errors in Cesium Beam Frequency Standards Introduced by Digital Control of the Microwave Excitation,}, year = {1995}, month = {1995-01-01 00:01:00}, publisher = {1995 IEEE Int. Freq. Cont. Symp. , San Francisco, CA, USA}, language = {en}, }