f27.1-1: Aerial photo; N.V. Betondak at Arkel on the Merwedekanaal, seen to the southwest
(by KLM)

f27.1-2: Drawing; design ground floor plan, N.V. Betondak at Arkel
f27.1-3: Drawing; floor plan with some details
f27.1-4: Staff entrance
(by E. Besnyö)

f27.1-5: Interior; boardroom
f27.1-6: Interior; meeting room
(by W. Brusse)