| 20814 | 21185 | The Trevithick Society | Illustrated catalogue of pumping and winding engines ? manufactured by Williams' Perran Foundry Co, Perranarworthal, Cornwall : Reprint Series No.1 | 1974 | E/30 | Trevit |
| 20815 | 17575 | Anthony Simon | The Simon Engineering Group | 1953 | E/51 | Simon/ |
| 20816 | 17573 | Jacques Payen | History of energy | 1966 | E/34 | Payen, |
| 20817 | 17574 | Robert Soulard | A history of the machine | 1964 | E/36 | Soular |
| 20818 | 17559 | J G Landels | Engineering in the ancient world | 1978 | E/36 | Landel |
| 20819 | 17582 | J G Landels | Engineering in the ancient world | 1978 | E/36 | Landel |
| 20821 | 17566 | Joseph Lucas Ltd | The story of power | | E/34 | Joseph |
| 20822 | 17567 | Owen Ashmore | Development of power in Britain | 1967 | E/34 | Ashmor |
| 20823 | 17568 | The Architectural Association | The engineers | 1982 | E/51 | Engine |
| 20824 | 17569 | Aubrey F Burstall | Simple working models of historic machines | 1968 | E/36.0 | Bursta |
| 20825 | 17570 | Miranda Green | Roman technology and crafts | 1979 | E/65.2 | Green, |
| 20826 | 17571 | Wendy Evans | Glass history | | E/33.8 | Evans, |
| 20827 | 17572 | Bryan Morgan | Transport preserved | 1963 | E/35 | Morgan |
| 20828 | 17581 | L Sprague de Camp | Ancient engineers | 1977 | E/51 | Engine |
| 20831 | 17580 | Jack Hampshire | Apprenticeship in steam : the memoirs of a general engineer | 1969 | E/51 | Hampsh |
| 20832 | 17577 | W H Chaloner and A E Musson | Industry and technology | 1965 | E/30 | Chalon |
| 20833 | 17579 | R A S Hennessey | Power | 1972 | E/34 | Hennes |
| 20834 | 17578 | W H Moore & Sons Limited | History of W. H. Moore and Sons Limited Birmingham : established 1817 : 1851 to 1951 | ? | E/36.1 | Moore |
| 20837 | 17598 | Brian Bowers | R. E. B. Crompton : an account of his electrical work | 1969 | E/51 | Crompt |
| 20838 | 17597 | Norman Smith | Man and water : a history of hydro-technology | 1976 | B/24.3 | Smith, |
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