7Williamson, O.E., The Economic Institutions of Capitalions, Free Press,1985,P93.
8Adelman, M.A., Integration and Antitrust Policy, Harvard Law Review, vol.63, 1949,27-77; Spengler, J.J., Vertical Integration and Antitrust Policy, Journal of Political Economy,vol.58, 1950,P347-352.
9Bain, J., Industrial Organization, John Wiley and Sons,1968,P381.
10Thompson, J.O., Organization in Action,McGraw Hill, 1967.
