TY  - BOOK
AU  - SUMMERS, J.K.
TI  - PRACTICAL AIR NAVIGATION SIMPLY EXPLAINED
U1  - RS475 
PY  - 1941///
CY  - LONDON
PB  - SIR ISAAC PITMAN & SONS,LTD
KW  - Reading Circle
N1  - Rs mean Reading Circle Page 1250-1275 in A-Z Register (Acc. No. Rs1-Rs717)
ER  -