TY  - BOOK
AU  - Elton,E J (ed)
AU  - Gruber, M J (ed)
TI  - Portfolio Theory, 25 years after vol 18: studies in management sciences 
SN  - 0444852794
U1  - 519.8 
PY  - 1979///
CY  - Amsterdam
PB  - North-Holland Publishing Company
KW  - Operations research
KW  - Portfolio management
ER  -