TY  - BOOK
AU  - Elton,E.J.(Edwin Joel)
AU  - Gruber,M.J.(Martin Jay),1937-
AU  - Markowitz,Harry (Harry Max),1927-
TI  - Portfolio theory, 25 years after
SN  - 0444852794
PY  - 1979///
CY  - Amsterdam
PB  - North-Holland Publishing Col
KW  - Investments
KW  - Addresses, essays, lectures
N1  - Bibl
ER  -