Non-Heuristic Program for Proving Elementary Logical Theorems by B. Dunham. UNESCO/NS/ICIP/1.6.10. Non-Heuristic Program for Proving Elementary Logical Theorems by B. Dunham. UNESCO/NS/ICIP/1.6.10.
1/4 inch magnetic audio tape on acetate base, stored in plastic case for 5 spools, 7 inch spool. Twisted tape at the beginning of reel Sound recording of Aylesbury concert
1/4 inch magnetic audio tape on polyester base, stored in Scotch Boy cardboard case (7 inch spool) Sound recording of Austerity locomotive at Dainton tunnel
1 roll Rhodesia Railways Type D.E.2 diesel-electric locomotives general arrangements and mechanical parts
1 file Woodall-Duckham list of drawings and materials for Vanderbijl Park coke oven locomotives, engine number E7950