No. 5 (June 1, 1939), no. 11 (Sept. 1, 1939), no. 30 (Sept. 1940) (No. 5, library also has revised ed.)Library also has issues catalogued as monograph
一般注記：
Each issue has a distinctive titleIssued by: United States Department of Commerce, Civil Aeronautics Administration (<no. 30>-)Some issues published i...