Perhaps you should try some spelling variations:
publicaciones peri » publicaciones de, publicaciones seriadas, publicaciones periodicas
instituto ecologia » instituto tecnologico, instituto geologico, instituto colombiano
peri instituto » para instituto, del instituto, el instituto
ecologia la » etologia la, ecologia de, ecologia y
la mineria » la materia

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: publicaciones peri instituto ecologia la mineria de espana ;~.
• Adding a wildcard symbol may retrieve word variants: publicaciones peri instituto ecologia la mineria de espana ;*.