Database and Articles Indices

Database of the National Library of Agriculture
Biodiversity Heritage Library
Digitized legacy literature of biodiversity
BioOne available through Drexel University Library
Research journals in the biological, ecological, and environmental sciences
Directory of Open Access Journals
Open Access index to scientific and scholarly journals
Search engine for NCBI (National Center for Biotechnology Information) databases
GPO Federal Digital System (FDsys)
Free online access to U.S. Government Publications
JSTOR: Global Plants (Academy connection required)
Over two million high-resolution plant type specimens and related materials
IUCN Red List of Threatened Species
Assessments of over 70,000 species and with each species account showing background documentation
The National Academies Press
Reports published by the National Academies Press available as free downloads for personal use
Directory of academic open access repositories
Repository of theses and dissertations
Pensoft Publishers Journal Archive
Open Access journals from Pensoft Publishers
U. S. National Library of Medicine database containing biomedical literature from MEDLINE, life science journals, and online books
Royal Society Journal Archive
Royal Society Journal Archive offering free access to articles more that 70 years old
TL-2, Vol. 1 and TL-2, Suppl I
Taxonomic Literature, 2nd ed., of the International Association for Plant Taxonomy, available through the Biodiversity Heritage Library
Toxic substances information, maintained by the National Library of Medicine
USGS Water-Data Reports
Annual water-data reports from each state
Books and other materials in libraries worldwide
Zoological Record, 1864-present (Academy connection required)
Worldwide coverage of Zoological literature