TY  - BOOK
AU  - Collins Norman R
AU  -  Preston Lee E
TI  - Concentration and pricecost margins in manufacurin
T2  - Publicaitons of the institute of business and economic research
U1  - X9:76, K8 
PY  - 1968///
CY  - Berkeley
PB  - University of California Press       
KW  - Industriel Economey
ER  -