Berry, B.J.L. (1963). Commercial structure and commercial blight. Research Papers. University of Chicago. Department of Geography.
2.
-. ( 1967). Geography of Market Centers and Retail Distribution. (Prentice-Hall).
3.
Blalock, H.M. (1960). Social Statistics. McGraw-Hill .
4.
Curry, L. (1967). Central places in the random spatial economy. Journal of Regional Science. Vol. 7. No. 2 (Supplement).
5.
Department Of Employment And Productivity ( 1968). Gazette. November.
6.
George, K.D. and Hills, P.V. (1968). Productivity and capital expenditure in retailing. Occasional Papers. No. 16. University of Cambridge. Department of Applied Economics. Cambridge University Press.
7.
Lewis, W.A. (1949). Overhead Costs. Some Essays in Economic Analysis . Allen and Unwin.
8.
Mcclelland, W.G. (1966). Costs and Competition in Retailing. London, Macmillan.
9.
Pickering, J.F. (1966). Resale Price Maintenance in Practice. London, Allen and Unwin.
10.
Shaw, (1967). The Standard Guide to Fair Prices. March. Roberts and Newton .
11.
Simmons, J.W. (1964). The changing pattern of retail location. Research Papers. University of Chicago. Department of Geography.
12.
Yamey, B. S. (ed). (1966). Resale Price Maintenance. London, Weidenfeld and Nicolson.