Military engineering : Water supply : 1936 / Army Council - Engeland Voorschrift, 26/Manuals/848 zwarte beertjes Tussen water en vuur / Hammond Innes ; [vert. uit het Engels door N.G. Hazelhoff] Manual of field engineering : Accommodation and water supply - Engeland Voorschrift, 26/GS Publications/695 pamphlet Field service pocket book : Pamphlet No. 5 : Billets, camps and bivouacs, camp cooking and water arrangements - Engeland Voorschrift, 26/Publications/3780
