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El centro de Recursos Educativos, monograf�as, tesis y contenido m�s amplio de la Red. M�s de 30.000 recursos originales.

Heráldica. Numismática. Filatelia. Mitología. Masonería. Matemáticas. Estadística. Arte. Ciencias. Historía. Bonsais. Telégrafo. Arcaismos. Etnografía. Vexilología. Castillos. Órdenes Militares.

Refdesk is a free and family friendly web site indexing and reviewing quality, credible, and current Internet reference resources.

Sources, resources, and research tools for journalists, writers, authors, media professionals, public relations professionals experts and media spokespersons, featuring international expert sources and media spokespeople available to speak to the media. Sources helps organizations get publicity and be known for their expertise and views.

Browse all academic books and journals categorised by subjects with the new Cambridge Core platform by Cambridge University Press.

A home for the discovery of digitised material and research outputs from the University of Cambridge and beyond

The world's largest museum library system – serving the Smithsonian Institution, the American people, and the world.

University of Colorado Boulder

Welcome to the Library Resource Guides at the Thompson Library. Here you'll find guides to help with research for specific topics, courses, resources and general library information. Let us know if you need more in depth assistance with any research you're doing!

A powerful, streamlined new Astrophysics Data System

Find nearly any book: new, used, rare and textbooks. Get the best deal by comparing prices from over 100,000 booksellers.

CAS Source Index (CASSI) Look Up Tool

DOAJ is a community-curated online directory that indexes and provides access to high quality, open access, peer-reviewed journals.

EBSCO is the leading provider of research databases, e-journals, magazine subscriptions, ebooks and discovery service for academic libraries, public libraries, corporations, schools, government and medical institutions