TY  - BOOK
AU  - Barlow, Roy  .
AU  - Derrick,Anthony  .
AU  - McNelis,Bernard  .
TI  - Solar pumping: Introduction and update on the technology, performance, costs and economics / 
SN  - 0-8213-2101-3
U1  - 621.0426 
PY  - 1993///
CY  -  : 
PB  - Intermediate technology publications , 
ER  -