Pinus contorta from untamed forest to domesticated crop : proceedings of a meeting with IUFRO Working Party S2.02.06 "Pinus concorta provenances and breeding" and "Frans Kempe symposium" : august 24-28, 1992, Umeå, Sweden. Editor Dag Lindgren. Umeå : Swedish University of Agricultural Sciences, 1993. 416 s. Institutionen för skoglig genetik och växtfysiologi, Rapport 11. ISSN 0348-7954.