TY  - BOOK
AU  - Shepard, Ronald W.
AU  - 
TI  - Cost and production functions
T2  - Lecture notes in Economics and Mathematical systems
SN  - 3540111581
U1  - 338.512 
PY  - 1981///
CY  - Berlin
PB  - Springer-Verlag
N1  - "reprint of the first edition"
ER  -