TY  - BOOK
ED  - United States.
ED  - United States.
TI  - ...The airplane propeller
AV  - TL705 .U5 1920
PY  - 1921///
CY  - Washington
PB  - Govt. print. off.
KW  - Propellers, Aerial
N1  - On verso of t.p.:  War department.  Document no. 998.  Office of the adjutant general
ER  -