Report of the eighth session of the International Poplar Commission held in Madrid, Spain at the Special School of Forestry Engineers, from 25th to 28th April 1955.

“…Session of the International Poplar Commission…”

Report of the fifth session of the International Poplar Commission and proceedings of the fourth International Poplar Commission held in United Kingdom April-May 1951.

“…Session of the International Poplar Commission and Proceedings of the Fourth International Poplar Commission…”