Fred L. Walls
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J A. Li,
Eva Ferre-Pikal,
Fred L. Walls,
1998
.
Fred L. Walls,
James Camparo,
E. S. Ferre-Pikal,
1999
.
Fred L. Walls,
Helmut Hellwig,
A. Kahan,
1978
.
Fred L. Walls,
1988
.
Fred L. Walls,
E. S. Ferre-Pikal,
2005
.
Archita Hati,
Fred L. Walls,
Amitava Sen Gupta,
2003,
IEEE International Frequency Control Symposium and PDA Exhibition Jointly with the 17th European Frequency and Time Forum, 2003. Proceedings of the 2003.
Robert E. Drullinger,
Jon H. Shirley,
Fred L. Walls,
1994,
Proceedings of Conference on Precision Electromagnetic Measurements Digest.