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Start Over Author Census Bureau Sudoc Stem C 31.107

1. Civil Aeronautics Administration, Commerce Dept. Civil aeronautics manuals. 33. [Study guides for applicants preparing for Night radio operator written and practical examinations], supp. 2.

Corporate/Agency Authors:: Census Bureau and Commerce Dept.
Publisher:: Census Bureau
Date:: Apr. 9, 1951
SuDoc number:: C 31.107:(nos.)

2. Civil Aeronautics Administration, Commerce Dept. Civil aeronautics manuals. 4b. [Airplane airworthiness, transport categories], supp. 6.

Corporate/Agency Authors:: Census Bureau and Commerce Dept.
Publisher:: Census Bureau
Date:: Dec. 21, 1950
SuDoc number:: C 31.107:(nos.)