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The product-planning system
Goslin, Lewis N., (1967)
Rugalmas termelésirányítás a gépiparban
Hajtó, Aurél, (1979)
Operations management : selected readings
Groff, Gene K., (1969)
Urban Amenities and Public Policy
Bartik, Timothy J.,
JEEM and non-market valuation : 1974 - 1998
Smith, V. Kerry, (2000)
Nonuse values in benefit cost analysis
Smith, V. Kerry, (1987)