TY  - BOOK
ED  - United States.
TI  - Instructions for airway meteorological service
T2  - Circular N
AV  - TL556 .U6 1935
PY  - 1935///
CY  - Washington
PB  - U.S. Govt. print. off.
KW  - Meteorology
KW  - Observers' manuals
N1  - At head of title: U. S. Department of agriculture.  Weather bureau; Earlier editions have title: Instructions for airway observers
ER  -