Practical air navigation and the use of the aeronautical charts of the Department of commerce
By: by Thoburn C. Lyon, assistant cartographic engineer.
Contributors: Lyon, Thoburn Cassady, 1896-
Series: Special publication; no. 197
Publisher: U.S. Govt. print. off.
Published: 1935
Place of publication: Washington
Language: eng
Number of pages: 63
Subjects: Navigation (Aeronautics)
Other titles: Air navigation.
Notes: At head of title:  U. S. Department of commerce.  Daniel C. Roper, secretary.  Coast and geodetic survey.  R. S. Patton, director ...
"Publications of the Bureau of air commerce": p. 59.