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On Shepard's duality theorem
Jacobsen, S. E., (1972)
Some problems in applying mathematical programming to opportunity costing
Bernhard, Richard H., (1968)
Opportunity costing : an application of mathematical programming
Samuels, J. M., (1968)
Savings and investment in the United Kingdom and West Germany
Samuels, John M., (1978)
International accounting : a survey
Samuels, John M., (1985)
Accounting for development : an alternative approach
Samuels, John Malcolm, (1990)