Most of our databases are designed to be very broad.
However, some are highly specific:
Subject Coverage:
zoology, botany, evolutionary biology, taxonomy, ecology, natural history, scientific illustration, biological science historiography
Dates of Coverage:
The bulk of material in the BHL is in the public domain in the United States, meaning that the publication date is prior to 1923. Materials published after 1922 are available in the BHL for one or more of the following reasons: 1) explicit permission to provide the content online from the copyright holder; 2) U.S. Federal government publications are in the public domain; 3) Works for which the copyright was not renewed; 4) Works made available via open access repositories
Update Frequency:
unknown
Size:
over 120,000 titles and over 200,000 volumes
Subject Coverage:
botany, the Catholic Church, commerce, economics, fisheries, geography, Indians, Jesuits, law, mineral resources, navigation, pirates, shipping, slave-trade, tobacco
Dates of Coverage:
1493-1750
Update Frequency:
unknown
Size:
more than 32,000 records
Subject Coverage:
traumatic stress and mental health sequelae, assessment, prevention, treatment, mental health services, professional ethics, public policy, and traumatized populations
Dates of Coverage:
1871 to present
Update Frequency:
monthly
Size:
more than 42,000 records
Note:
PTSDpubs is produced at the headquarters of the National Center for Post-Traumatic Stress Disorder in White River Junction, Vermont and is sponsored by the U.S. Department of Veterans Affairs.
Subject Coverage:
culture, history, and law
Dates of Coverage:
colonial era to the early years of the 20th Century
Update Frequency:
irregular
Size:
more than 1,100 titles and nearly 850,000 pages
Subject Coverage:
materials relating to Shakespeare
Dates of Coverage:
1960 to present
Update Frequency:
unavailable
Size:
more than 127,500 records
Note:
Types of items indexed include: books, articles, book reviews, dissertations, theatrical productions, reviews of productions, audiovisual materials, and electronic media