1. Circular 8 [1936.]. 8-14. Tables of vertical and horizontal components of distance of pilot balloons; Apr. 15, 1936. [1936.] 65 p. [Issued with perforations for insertion in binder.] Bookmark Corporate/Agency Authors: Signal Office and Finance Department Publisher: Signal Office Date: [November 1936] SuDoc number: W 42.4:8-14