Bruin leren vliegerkap in winter uitvoering gevoerd met schapevacht, Type B-6 Verenigde Staten van Amerika Special Forces commander's manual for MOS 11B (SQI S) / Headquarters, Department of the Army - USA Field Manual, FM 31-11B-S/CM drums would roll : a pictorial history of US Army Bands on the American frontier : 1866-1900 / Thomas C. Railsback & John P. Langellier
