Control tower and dispatcher ratings.
APA Citation
Zweng, C. Alfonso. (1955). Control tower and dispatcher ratings. 2d rev. ed. North Hollywood, Calif.: Pan American Navigation Service.
MLA Citation
Zweng, Charles Alfonso, 1893-. Control Tower And Dispatcher Ratings. 2d rev. ed. North Hollywood, Calif.: Pan American Navigation Service, 1955.
Warning: These citations may not always be complete (especially for serials).