Cirujeda Ranzenberger, Alicia <br/><br/>
Remarkable changes of weed species in Spanish cereal fields from 1976 to 2007  Recurso electrónico 
Alicia Cirujeda, Joaquín Aibar, Carlos Zaragoza 
 - Agronomy for sustainable development .
<br/><br/><br/>Requerimientos del sistema -- programa Adobe Acrobat 
<br/><br/><label>Subjects--Index Terms: </label>España Malezas Biodiversidad