Appropriate technology
- London: Intermediate Technology Publications Ltd.
- v.p.
Lib/Misc/78/1983-84(wdr no.2658-59;acc.no.9717-18)
Lib/Misc/78/1983-84(wdr no.2660;acc.no.11780)
Lib/Misc/78/1983-84(wdr no.2661-62;acc.no.14474-75)
Lib/Misc/78/1983-84(wdr no.2664;acc.no.14476)
Lib/Misc/78/1983-84(wdr no.2663;acc.no.14750)