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David J. Downing

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Aspen Vegetation Types of the Low Boreal Mixedwood Ecoregion, East-central Alberta (first Approximation)
Integrated Resource Inventory of the East Peace Study Area
Integrated Resource Inventory of the Smoky-Peace Point Study Area
Le système canadien de classification de la végétation : première approximation, 1990
David J. Downing — Books & Biography | Menrva Books | MenrvaBooks