Lawcat - the Berkeley Law online catalog — is the first place to start to locate books and journals on a particular topic.
Example: Keyword search for critical race theory
Note the subject headings assigned to the resulting titles:
Critical legal studies--
Race Discrimination --
Example: Keyword search for climate change
Note the subject headings assigned to the resulting titles:
Climatic Changes --
Global warming --
United Nations Framework Convention on Climate Change (1992) --
Example: title search for American Journal of International Law
Note: link to Hein Online
OskiCat is the web-based catalog for most of the holdings of the UC Berkeley libraries (but not the law library.) OskiCat works in the same way as LawCat
Example: Keyword search for climate change
Note the subject headings assigned to the resulting titles
Melvyl is the online catalog for all 9 UC campuses. Periodical holdings also include Cal State campuses, Stanford, and many other research and special libraries in California.
Example: Advanced Search | Keyword | International Adoption (and can choose to search Libraries Worldwide; University of California Libraries or UC Berkeley Libraries)