Five minutes to one bell : a few hints to junior watch-keepers / by a watch-keeper (B.V. Sturdee) Interior Guard duty: volume VI / prepared under direction of the Chief of Infantry - United States War Department, Basic Field Manuel, FM 26-5 Rapporten : rapportencahier IIde Bat. - 2de Compagnie Sgt. vd Dag 13-8-1951
