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Turok, J. ,  Lefèvre, F. ,  Cagelli, L. ,  de Vries, S. ,  European Forest Genetic Resources Programme ,  [Populus nigra network: Report of the 2nd meeting, 10-12 September 1995, Casale Monferrato, Italy] ,  Populus nigra network: Report of the 2nd meeting, 10-12 September 1995, Casale Monferrato, Italy

Turok, J. ,  Lefèvre, F. ,  de Vries, S. ,  Heinze, B. ,  Volosyanchuk, R. ,  Lipman, E. ,  European Forest Genetic Resources Programme ,  International Plant Genetic Resources Institute ,  [Populus nigra Network: Report of the 5th meeting, 5-8 May 1999, Kyiv, Ukraine] ,  Populus nigra Network: Report of the 5th meeting, 5-8 May 1999, Kyiv, Ukraine

Borelli, S. ,  de Vries, S. ,  Lefèvre, F. ,  Turok, J. ,  European Forest Genetic Resources Programme ,  International Plant Genetic Resources Institute ,  [Populus nigra network: Report of the 6th meeting, 6-8 February 2000, Isle sur La Sorgue, France] ,  Populus nigra network: Report of the 6th meeting, 6-8 February 2000, Isle sur La Sorgue, France

Lefèvre, F. ,  Barsoum, N. ,  Heinze, B. ,  Kajba, D. ,  Rotach, P. ,  de Vries, S.M.G. ,  Turok, J. ,  European Forest Genetic Resources Programme ,  [In situ conservation of Populus nigra] ,  In situ conservation of Populus nigra

Turok, J. ,  Lefèvre, F. ,  de Vries, S. ,  Alba, N. ,  Heinze, B. ,  Slycken, J. van ,  European Forest Genetic Resources Programme ,  [Populus nigra network: Report of the 4th meeting, 3-5 October 1997, Geraardsbergen, Belgium] ,  Populus nigra network: Report of the 4th meeting, 3-5 October 1997, Geraardsbergen, Belgium

Turok, J. ,  Lefèvre, F. ,  de Vries, S. ,  Tóth, B. ,  European Forest Genetic Resources Programme ,  [Populus nigra network: Report of the 3rd meeting, 5-7 October 1996, Sárvár, Hungary] ,  Populus nigra network: Report of the 3rd meeting, 5-7 October 1996, Sárvár, Hungary

Frison, Emile A. ,  Lefèvre, F. ,  de Vries, S. ,  Turok, J. ,  European Forest Genetic Resources Programme ,  [Populus nigra network: Report of the 1st meeting, 3-5 October 1994, Izmit, Turkey] ,  Populus nigra network: Report of the 1st meeting, 3-5 October 1994, Izmit, Turkey