The theory of contra-vanes applied to the propeller
By: Albert Betz.
Contributors: United States. National Advisory Committee for Aeronautics.
Publisher: NACA
Published: 1939
Place of publication: [Washington]
Number of pages: 27
Subjects: Propellers; Vanes
Notes: Original German version: Zur Theorie der Leitapparate fur Propeller.

Ingenieur-Archiv, v.IX, no.6, December 1938, p.435-452.

Bibliographical references: p.21.