The IOS has its 25th anniversary in 2017, and a superb way to celebrate it will be to get yourself to the Czech Republic in July where, during Oak Open Days based at his arboretum near Poděbrady, enthusiastic and dynamic IOS member Dušan Plaček is sponsoring a "Birthday Banquet" for participants at Poděbrady Castle.
Importing acorns, see individual country names
International Dendrology Society, R1:32
Introgression (clinal variation), see also individual species, section or region names
Introgression Turkish oaks, 5:3
Inventory of Rare and Endangered Vascular Plants of California, R1:48
Islas, Luis M. article, Distribution of Oak in the State of Sonora, Mexico, 4:6