Allen, W. K. <br/>
       Traveling wave tube re-entrant amplifier serrodyne system [NASA TN D-2149] 
 / W. K. Allen, L. J. Ippolito and D. A. Nace 
 .- Washington, D.C.: National Aeronautics and Space Administration,  1964 
 .- 17p. 
.- ( National Aeronautics and Space Administration (NASA)   
<br/><U>Author Added Entry: </u><br/>Ippolito, L. J.;<br/>Nace, D. A.;