Kent, D. L. (1990). GUMTREE: General utilisation model of timber resources - economic evaluation. Wood Utilisation Research Centre, Dept. of Conservation and Land Management.
Citace podle Chicago (17th ed.)Kent, D. L. GUMTREE: General Utilisation Model of Timber Resources - Economic Evaluation. Harvey, W.A.: Wood Utilisation Research Centre, Dept. of Conservation and Land Management, 1990.
Citace podle MLA (8th ed.)Kent, D. L. GUMTREE: General Utilisation Model of Timber Resources - Economic Evaluation. Wood Utilisation Research Centre, Dept. of Conservation and Land Management, 1990.
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