TY  - BOOK
AU  - Frisch. Ragnar and Nataf, A.
AU  - Nataf, A. ; jt. auth.
TI  - Maxima and minima; theory and economic applications
U1  - 658.40331 
PY  - 1966///
CY  - Dordrecht
PB  - D. Reidel
ER  -