1. Environmental Protection Division: Technical report EP (series). 19. Acoustic transmission properties of winter headgear [with list of references; by Howard W. Hembree, Henry F. Gaydos]. Bookmark Corporate/Agency Authors: Quartermaster General of the Army and Defense Dept. Publisher: Quartermaster General of the Army Date: [Aug. 1955.] SuDoc number: D 106.9/4:19