John Seton Mackay
Going, Charles Buxton
A. P. Pi︠a︡tibratov
Katherine Radeka
PPM and Other Propulsion R & T Conference (1997 Cleveland, Ohio)
G. A. Surovt͡sev
A. A. Bevzeli͡uk
J. E. Thompson
Kurt Sieben
Sidney A. Reeve
Gustav Gabriel
A. I. Sidorov
Unknown Author
I︠U︡. S. Vasilʹev
Daniel J. Hauer
Aleksandr Stepanovich Golovachev
Knoeppel, C.E., & co. (New York)
Gideon Halevi
K. W. Brown
Jiri J. Klemes