TY  - BOOK
AU  - Ferber,Robert
AU  - Verdoorn,P.J.
TI  - Research methods in economics & business
U1  - 330.72 
PY  - 1962/// [Reprinted 1970]
CY  - New York
PB  - Macmillan
KW  - Economics
KW  - Research
N1  - Includes bibliography and Index
ER  -