Practical air navigation
By: by Thoburn C. Lyon.
Series: U. S. Civil aeronautics administration.  Civil aeronautics bulletin; no. 24 Sept. 1940
Publisher: U.S. Govt. print. off.
Published: 1940
Place of publication: Washington
Language: eng
Number of pages: 245
Subjects: Navigation (Aeronautics)
Notes: Bibliography: p. 238-239.
At head of title:  United States Dept. of commerce, Civil aeronautics administration, Washington, D.C.
"This publication supersedes U. S. Coast and geodetic survey Special publication no. 197, Practical air navigation and the use of the aeronautical charts of the U. S. Coast and geodetic survey, which has been discontinued."
"Publications of the Civil aeronautics administration": p. 235-238.