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090 _aHE5613.5.W37
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100 1 _aWalters, A.A.
_948665
245 1 0 _aCosts and scale of bus services :
_bworld bank staff working paper /
_cA.A. Walters.
260 _aWashington :
_bThe World Bank,
_c1979.
650 0 _aMicroeconomics.
650 0 _aIndustrial organization (Economic theory).
650 0 _aProduction (Economic theory).
907 _a.b12784151
_b2021-05-28
_c2019-11-12
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