Thanks Alex. This pdf is a very good read for anyone with an interest in maple species. Link added to the Maple Resources section. (BTW, all of the links in the Maple Resources area are working properly again now, after being broken for a long time.)
Douglas Gibbs, one of the authors, gave an interesting presentation on the subject at the International Maple Symposium. He had plenty of free copies of the booklet ;-)) Gomero
