By Nicholls Stephen J.   Pulkki Reino E.   Ackerman Pierre A.   in Southern African Forestry Journal

ISSN:1029-5925|207|1|55-61

NISC Pty Ltd‎(2006)‎

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By Pellegrini Marco   Ackerman Pierre   Cavalli Raffaele   in Southern Forests: a Journal of Forest Science

ISSN:2070-2639|75|2|89-96

Taylor & Francis Ltd‎(2013)‎

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