<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Irgens-Moller, H</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Forest-tree genetics research: Quercus L.</style></title><secondary-title><style face="normal" font="default" size="100%">Economic Botany</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Hybridization</style></keyword><keyword><style  face="normal" font="default" size="100%">oak products</style></keyword><keyword><style  face="normal" font="default" size="100%">oak trees (Quercus spp.)</style></keyword><keyword><style  face="normal" font="default" size="100%">propagation</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1955</style></year></dates><volume><style face="normal" font="default" size="100%">9</style></volume><pages><style face="normal" font="default" size="100%">53-71</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Oaks are the sources, not only of the most valuable timber among broad-leaved trees of the northern hemisphere, but also of cork, tannin, a dye, and food for man and beast. Their prolonged pre- flowering periods and other factors have discouraged genetic in- vestigation of them, but what little is known in that direction is here summarized.</style></abstract></record></records></xml>