TY  - BOOK
AU  - Betz,Mathew J.
AU  - McGowan,Patrick J.
AU  - Wigand,Rolf T.
TI  - Appropriate technology: choice and development 
SN  - 0822305739 :
U1  - 338.91 
PY  - 1984///
CY  - Durham, N.C.
PB  - Duke University Press
KW  - Appropriate technology
N1  - Includes index
ER  -