The California State Archives Office will research their holdings for you for relevant materials, which are exclusively available in the Archives, not in any other libraries. A list of the legislative resources preserved in the Archives can be found here, and may be obtained using this order form. The archivists will perform the search for you for free, and charge you a reasonable fee for photocopies. The turnaround time (from receipt of a request to sending out copies) is usually within a week. See the above URL for contact information.
Use indexes such as LegalTrac and Index to Legal Periodicals to find law review articles on your legislation and/or the subject of your legislation. Also check the Main Library's Electronic Resource Finder for indexes and full-text databases to search newspapers and other journal articles. You may choose America's Newspapers from the list and use the "California Newspapers" search shortcut from the navigation bar on the left of the search screen.
For 1975 to present: (Micro Room, LL205, Case L, Drawer 2) Prepared by the Assembly Office of Research, this is a nonpartisan analysis of each bill giving committee digest, comments, fiscal effect, and amendments. Frequently, this will be the only place you will find committee reports.
It is sometimes effective to contact the bill's author; especially for recently enacted legislation (s/he may have materials in his or her file cabinets, plus other leads). Be sure to provide the year and bill number when requesting bill analysis information. Ask at the reference desk for phone numbers.
Don't forget about advocacy groups, research centers, think tanks and foundations that may have been interested in the legislation. Try the following:
For a fee you may have your search done by a commercial searching service, and since they have access to materials in Sacramento that we do not receive in our library, such a search may turn up useful information. Some services to try are:
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