Bibliographies on specialized topics are easily created by combining search terms. A number of years can be scanned in seconds. Increased access points. Most databases only cover the early 1970's to present. Not all indexes are available on-line.
Some databases are very expensive to search.
The computer matches only the terms you select. An on-line search provides either a bibliography or, sometimes, a set of facts. Each bibliographic citation includes author, title, source, and an abstract, if desired. The text of the articles are not printed. The bibliography may include journal articles, conference proceedings, government reports, technical papers, and books.