Vertica.
Oxford : Pergamon Press,
1976-
"The international journal of rotorcraft and powered lift aircraft."
Computer & control abstracts
Electrical & electronics abstracts
Engineering index annual (1968)
Engineering index bioengineering abstracts
Engineering indes energy abstracts
Engineering index monthly (1984)
Excerpta medica
International aerospace abstracts
Physics abstracts
Helicopters
Vertically rising airplanes