military training pamphlet Construction of dannert concertina wire obstacles with angle-iron pickets (provisional) - Engeland Voorschrift, 26/GS Pubns./193 military training pamphlet Dannert concertina wire obstacles (provisional) - Engeland Voorschrift, 26/GS Pubns./113 military training pamphlet Dannert concertina wire : Instructions for closing and fastening (provisional) - Engeland Voorschrift, 26/GS Pubns./227