W. F. Walls
发表
M. Mourey,
F. Marionnet,
F. Sthal,
1999,
Proceedings of the 1999 Joint Meeting of the European Frequency and Time Forum and the IEEE International Frequency Control Symposium (Cat. No.99CH36313).
W. F. Walls,
1992,
Proceedings of the 1992 IEEE Frequency Control Symposium.
Fred L. Walls,
W. F. Walls,
2001,
Proceedings of the 2001 IEEE International Frequncy Control Symposium and PDA Exhibition (Cat. No.01CH37218).