Michaels, G., R. Levins, and J. Fruin. "Rail/Truck Competition
 for Grain Traffic in Minnesota: Implications for Rate
 Making," American Journal of Agricultural Economics 64,2
 (1982):276-9.


 Miklius, W. "Estimating the Demand for Truck and Rail Trans-
 portation: A Case Study of California Lettuce," Agricul-
 tural Economics Research 29,2(1967):46-50.


Miklius, W. ard: K. Casavant. "Estimated and Perceived Varia-
 bility of Transit Time," Transportation Journal 15,4(1975):
 47-51.


Miklius, W., K. Casavant, and P. Garrod. "Estimation of Demand
 for Transportation of Agricultural Commodities," American
 Journal of Agricultural Economics 58,2(1976):217-23.


Olson, J. "Price Discrimination by Regulated Motor Carriers,"
 American Economic Review 62(1972): 395-402.


Oum, J. "A Cross Sectional Study of Freight Transport Demand
 and Rail-Truck Competition in Canada," Bell Journal of
 Economics 10,2(1979):463-82.


Pavlovic, K., G. Long, D. Reaves, and T. Maze. Domestic Trans-
 portation for Florida Perishable Produce, Transportation
 Research Center, Univ. of Florida, 1980.


Pederson, L., R. Mittelhammer, and K. Casavant. "Factors
 Affecting Interstate Backhauling of Exempt Agricultural
 Commodities by Regulated Motor Carriers: A First Look,"
 Transportation Journal 19,2(1979):46-52.


Pegrum, D. Transportation Economics and Public Policy, Illi-
 nois, Richard D. Irwin, Inc., 1973.


Perkins, M. A Truck Freight Model, Massachusetts Institute of
 Technology, Center for Transportation Studies Report 80-15,
 1980.


Phlips, L. The Economics of Price Discrimination, New York,
 Cambridge University Press, 1983.