Third annual survey reflects increasing usefulness, in civil and military affairs, of helicopters; last year survey listed 996 operators in 91 countries; 1967 totals are 986 in 105 countries; United States, Canada, Japan and Great Britain continue to be world leaders in helicopter usage, if measured in terms of operators, with 382, 94, 38 and 38 respectively.
World helicopter market
Flight
Flight International ; 92 , n 3044
1967
15 pages
Aufsatz (Zeitschrift)
Englisch
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