Tufts Catalog   Using this catalog, you can search records of all books, journals, CD-ROMs, videos etc., owned by the Tufts University Libraries.     Periodical Databases   Using these databases, you can search by subject, author, or title to find periodical article citations and, in some cases, abstracts. Periodical databases can be found in print, on the Web, and on CD-ROM. Biological Abstracts, Medline, FirstSearch, and Science Citation Index Expanded will be covered here.     Web Resources   Many biological web resources are available: here you can learn about search strategies and evaluation skills for some useful search engines: HotBot, Alta Vista, MetaCrawler, and Yahoo.