Ferber, Robert
Research methods in economics and business by Robert Ferber and P.J. Verdoorn - New York Macmillan 1962 - 573p.
Economics --Research
I551 F373
Research methods in economics and business by Robert Ferber and P.J. Verdoorn - New York Macmillan 1962 - 573p.
Economics --Research
I551 F373
