<?xml version="1.0" encoding="UTF-8"?>
<references>
<reference>
  <a1>Escudero, M.</a1>
  <a2>Lozano, A.</a2>
  <a2>Hierro, J.</a2>
  <a2>Tapia, O.</a2>
  <a2>Valle, J. del.</a2>
  <a2>Alastuey, A.</a2>
  <a2>Moreno, T.</a2>
  <a2>Anzano, J.</a2>
  <a2>Querol, Xavier</a2>
  <t1>Assessment of the variability of atmospheric pollution in national parks of mainland Spain</t1>
  <t2>Atmos. environ. (1994)</t2>
  <sn/>
  <op/>
  <vo/>
  <ab/>
  <la>eng</la>
  <k1/>
  <pb/>
  <pp/>
  <yr>2016</yr>
  <ed/>
  <ul>http://zaguan.unizar.es/record/75583/files/texto_completo.pdf;
	http://zaguan.unizar.es/record/75583/files/texto_completo.jpg?subformat=icon;
	</ul>
  <no>Imported from Invenio.</no>
</reference>

</references>