<?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%">Mei* Zheng</style></author><author><style face="normal" font="default" size="100%">Yuan Cheng</style></author><author><style face="normal" font="default" size="100%">Limin Zeng</style></author><author><style face="normal" font="default" size="100%">Yuanhang* Zhang</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Developing chemical signatures of particulate air pollution in the Pearl River Delta region, China</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of environmental sciences (China)</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2011</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://europepmc.org/abstract/MED/22125907</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">7</style></number><volume><style face="normal" font="default" size="100%">23</style></volume><pages><style face="normal" font="default" size="100%">1143—1149</style></pages><language><style face="normal" font="default" size="100%">eng</style></language></record></records></xml>