L' hélicoptère, cet inconnu
Subtitle: ou, Philosophie de la giraviation
By: Hector Goffard, avec la participation de J. D. Goffard et de J. Hoffelt ; et la collaboration de A. Bruart.
Contributors: Goffard, J. D., joint author.; Hoffelt, J., joint author.
Publisher: Giravia : diffusion, SODEDI
Published: 1973
Place of publication: Bruxelles
Language: fre
Number of pages: 114
Subjects: Helicopters.
Notes: Errata slip inserted.