Military engineering : Railway bridging : Supplement No. 1A: Additional notes for erection and launching drill - unit construction railway bridge / Army Council. Volume … Bridging (general principles and materials) - Engeland Voorschrift, 26/Manuals/1399 Military engineering : Port Construction : Supplement No. 1A: Additional notes on 'V' type steel trestling for marine piers / Army Council. Volume VIII: Transportation … Military engineering : Railway bridging : Supplement No. 2A: Additional notes on light and standard steel trestles / Army Council. Volume VIII: Transportation - Engeland …