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3201. Notice to aviators no. 5; May 1, 1940.

3202. Notice to aviators no. 6; June 1, 1940.

3203. Notice to aviators no. 7; July 1, 1940.

3204. Notice to aviators no. 8; Aug. 1, 1940.

3205. Notice to aviators no. 9; Sept. 1, 1940.