TY  - BOOK
AU  - Ferber, Robert,
AU  - Verdoorn, Petrus Johannes.
TI  - Research methods in economics and business
U1  - 330.7 
PY  - 1962///
CY  - New York
PB  - McMillan
KW  - Economics
KW  - Research
N1  - Includes bibliographical references
ER  -