Compare the scope and size the three databases below.
Subject Coverage:
congress, the legislative process
Dates of Coverage:
1983 to present
Update Frequency:
weekly
Size:
equivalent to a dozen shelves worth of bound volumes
Subject Coverage:
covers the complete range of academic subjects appearing in dissertations accepted at accredited institutions
Dates of Coverage:
1637 to present (for selected British and European dissertations)
1861 to present (for indexing of U.S. dissertations)
July 1980 to present (for dissertations with abstracts)
January 1988 to present (for Master's Theses with abstracts)
1997 to present (for the full-text of most dissertations)
2013 to present (for indexing and full-text of theses produced at Morehead State University)
Update Frequency:
monthly
Size:
more than 3,800,000 records
more than 1.700.000 full-text documents
Subject Coverage:
covers countless subjects
Dates of Coverage:
1000 C.E. to present
Update Frequency:
daily
Size:
more than 548 million item records
more than 3.3 billion holdings records
Note:
It includes manuscripts written as early as the 11th century as well as books cataloged yesterday. It would be a challenge to name a book that would not have a record in this database. Numerous journal articles are also available through WorldCat.
Click into the 'Advanced Search' screen and look at the number of fields indexed for each and compare.
Subject Coverage:
numerous subjects
Dates of Coverage:
PDF content back to 1975
Update Frequency:
unknown
Size:
Nearly 1,700 full-text periodicals
Subject Coverage:
psychology & related fields
Dates of Coverage:
1600s to present
Update Frequency:
weekly
Size:
more than 5 million records
Notes:
Ninety-nine percent of the covered material is peer-reviewed.
Has one of the highest DOI matching rates in the publishing industry
Offers options for searching on Cited References
Training Videos: https://www.youtube.com/c/APAPublishingTraining/videos
What unique search capabilities might indexed fields allow?
Subject Coverage:
geology & earth sciences
Dates of Coverage:
1785 to present (for records from North America)
1933 to present (for international records)
Update Frequency:
biweekly
Size:
more than 2,609,700 records
Notes:
Abstracts are included in records between 1961 and 1974. The database grows by more than 60,000 records annually.
Subject Coverage:
nursing and allied health
Dates of Coverage:
1982 to present
1986 to present (for records with abstracts)
Update Frequency:
monthly
Size:
more than 670,000 records