TY  - BOOK
AU  - Piggott, Derek
TI  - Understanding gliding: the principles of soaring flight / 
SN  - 071361647
U1  - 629.133 
PY  - 1977///]
CY  - London : 
PB  - Adam and Charles Black, 
KW  - Aeronautics
KW  - Airplanes
KW  - Gliders (Aeronautics)
N1  - Includes index; with illustrations by the author
ER  -