//-->
Industrial concentration: The new learning. The 1974 Conference on Industrial Concentration. Ed. by Harvey J. Goldschmid, H. Michael Mann, J. Fred Weston
Goldschmid, Harvey J., (1974)
Advertising and concentration : an empirical investigation
Mann, H. Michael, (1967)
Advertising and concentration : new data and an old problem
Mann, H. Michael, (1971)