<?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%">Baes, Charles F</style></author><author><style face="normal" font="default" size="100%">McLaughlin, Samuel B</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Trace Elements in Tree Rings: Evidence of Recent and Historical Air Pollution</style></title><secondary-title><style face="normal" font="default" size="100%">Science</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Air particles -- Deposition -- Heavy metals</style></keyword><keyword><style  face="normal" font="default" size="100%">Flora</style></keyword><keyword><style  face="normal" font="default" size="100%">Pollution</style></keyword><keyword><style  face="normal" font="default" size="100%">Trees</style></keyword><keyword><style  face="normal" font="default" size="100%">Trees -- Growth</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1984</style></year><pub-dates><date><style  face="normal" font="default" size="100%">May</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">224</style></volume><pages><style face="normal" font="default" size="100%">494-497</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">4648</style></issue></record></records></xml>