AgEcon Search

Scholarly literature in agriculture and applied economics

ArticleFirst

Citations for many journals and magazines, 1990-present

arXiv.org

Open access database covering statistics and the sciences

Calisphere

Primary sources from the University of California Libraries

GPO MetaLib

Search more than 50 U.S. federal government databases

MedlinePlus

Consumer health information from the National Library of Medicine, National Institutes of Health, and other trusted sources

OECD iLibrary

Catalog of the Organisation for Economic Cooperation and Development

Portico

Repository for electronic resources

PTSDpubs

Index to worldwide literature about PTSD (formerly PILOTS)

PubMed@UCR

More than 24 million citations for biomedical literature

VectorBase

Resource center focused on invertebrate vectors of human pathogens