TY  - BOOK
AU  - Downie, Don
AU  - Doenie, Ruth
TI  - COCKPIT NAVIGATION GUIDE
U1  - 621.5251 
PY  - 1962///
CY  - N. Y.
PB  - Modern Aircraft Series
KW  - Navigation (Aeronautics)
KW  - Aeroplanes -- Piloting
ER  -