Substantive element "Maintaining forest cover to meet present and future needs" 2003. Franc, A.; Mosseler, A.; Parrotta, J. Pages 11-14 in A. Buck, J. Parrotta, and G. Wolfrum, editors. Science and Technology - Building the Future of the World's Forests. Planted Forests and Biodiversity, Proceedings: Third Session of the United Nations Forum on Forests. May 24-June 6, 2003, Geneva, Switzerland. IUFRO, Vienna, Austria.