TY  - BOOK
AU  - Utton M A
TI  - Industrial concentration
T2  - Penguin modern economics texts
U1  - "X9:517, L0/TD3" 
PY  - 1970///
CY  - Harmondsworth
PB  - Penguin Books      
KW  - Trade
N1  - Bibliography P 125-28
ER  -