TY  - GEN
AU  - Whitehead Judy A
TI  - Empirical production analysis and optimal technological choice for economists : : a dynamic programming approach 
SN  - 0856280306
AV  - TS183  
PY  - 1990///
CY  - Brookfield, USA : 
PB  - Avebury, 
KW  - Appropriate technology
ER  -