United States air mail service
Subtitle: Pilots' directions, New York-San Francisco route. Distances, landmark compass course, emergency and regular landing field with service and communication facilities at principle points on route
Publisher: Govt. Print. Off.
Published: 1921
Place of publication: Washington
Language: eng
Number of pages: 70
Subjects: Air mail service
Other titles: Pilots' directions, New York-San Francisco route.
Notes: Running title: Pilots' directions, New York-San Francisco route.