Perhaps you should try some spelling variations:
instrumento biologico » instrumento politico, instrumento pedagogico, instrumento didactico
publicaciones e » publicaciones de, publicaciones en, publicaciones y
e instrumento » e instrumentos, de instrumentos, un instrumento
biologico y » biologicos y, biologica y, biologico de
y general » _ general, ley general, y generos

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

• Performing a fuzzy search may retrieve terms with similar spellings: publicaciones e instrumento biologico y general de espana ;~.
• Adding a wildcard symbol may retrieve word variants: publicaciones e instrumento biologico y general de espana ;*.