Columbia subject headings:
Lasers in astronautics--Congresses.
Particle beams--Industrial applications--Congresses.
Rocket engines--Thrust--Congresses.
Space vehicles--Propulsion systems--Congresses.
Harvard subject headings:
Beamed-energy propulsion--Congresses.
Lasers in astronautics--Congresses.
Nuclear rocket engines--Congresses.
Particle beams--Industrial applications--Congresses.
Rocket engines--Thrust--Congresses.
Space vehicles--Propulsion systems--Congresses
Princeton subject headings:
Lasers in astronautics--Congresses.
Particle beams--Industrial applications--Congresses.
Rocket engines--Thrust--Congresses.
Space vehicles--Propulsion systems--Congresses.