TY  - BOOK
AU  - Robert Ferber
AU  -  P. J Verdoorn, 
TI  - Research methods in economics and business
U1  - 330.072 
PY  - 1962///
CY  - New York
PB  - Macmillan & Co
N1  - Robert Ferber & P. J Verdoorn: Research methods in economics and business.  New York.  Macmillan & Co, 1962.--(330.072FER)
ER  -