@book{Ayers_1979,
title={Efficiency Improvements in Coupled Cavity Traveling Wave Tubes.},
url={http://dx.doi.org/10.21236/ada080961},
DOI={10.21236/ada080961},
institution={Defense Technical Information Center},
author={Ayers,
W. R. and Walker,
F. Ruth},
year={1979},
month=oct }