Downs D.S. Propelling charge residue investigation. Pt. 1, 1981. - 77 мкф. - Текст : непосредственный.
Downs D.S. Prediction of wear characteristics of artillery propelling charges / D.S.Downs,J.A.Lannon,L.E.Harris, 1981. - 44 мкф. - Текст : непосредственный.