TY  - BOOK
ED  -  International Civil Aviation Organization. 
TI  -  Aeronautical charts : : international standards and recommended pra ctices
PY  - 1950///
CY  -  Montreal : 
PB  -  International Civil Aviation Organization, 
KW  -  Aeronautical charts
KW  -  Law and legislation
N1  -  Issued also in French, Russian and Spanish;  "September 1950."
ER  -