TY  - BOOK
AU  - BETZ Mathew J  etc. Ed.
TI  - Appropriate technology:  Choice and development
T2  - Duke press policy studies
SN  - 0822305739
U1  - X(F):275.1(Y:4).N83, M4 
PY  - 1984///
CY  - Durham
PB  - Duke Press Policy Studies   
ER  -