TY  - BOOK
AU  - Field,Richard M.
AU  - Stetson,Harlan True
TI  - Map reading and avigation: an introduction / 
U1  - 629.13254 
PY  - 1942///
CY  - New York
PB  - D. Van Nostrand Company, inc.
KW  - Navigation (Aeronautics)
KW  - Maps
N1  - "Reference books and materials": p. 117
ER  -