John Hacskaylo
Brian Barkley
Pélée de Saint-Maurice
International Plant Genetic Resources Institute
Henry Charles Wilks
Justus Vesti
Unknown Author
Momir Nikolić
Peter C. Bates
T. E Russell
Ionescu, Adrian ing.
Jean Chardenon
Quebec (Province). Forest Genetics Research Committee.
Québec (Province). Groupe de chercheurs sur le peuplier.
Neville T. Schaefer
Bernard Taris
International Poplar Commission.
George R. Trimble
Maurice E. Demeritt