Sudoc Stem: C 31.223 - Blacklight Search Results

Start Over Sudoc Stem C 31.223

1. Safety study. 102-49. What causes collisions? by Harold G. Crowley and Edward B. Hevl.

Corporate/Agency Authors:: Civil Aeronautics Board and Commerce Dept.
Publisher:: Civil Aeronautics Board
Date:: Jan. 15, 1949
SuDoc number:: C 31.223:(no.)

2. Safety study. 101-48. Let's look at spia crashes; by H. G. Crowley and Edward B. Heyl.

Corporate/Agency Authors:: Civil Aeronautics Board and Commerce Dept.
Publisher:: Civil Aeronautics Board
Date:: Oct. 1, 1948
SuDoc number:: C 31.223:(no.)