The helicopter, its importance to commerce and to the public
By: by Ann N. Davis and Robert A. Richardson.
Contributors: Richardson, Robert A., joint author.; Helicopter Association of America.
Edition: 1st ed.
Publisher: Helicopter Association of America
Published: 1978
Place of publication: Washington
Language: eng
Number of pages: 137
Subjects: Helicopter transportation -- United States.
Notes: Bibliography: p. 136-137.