Here are some useful places to start. For more information, see the Zief Library Federal Legislative History research guide. You can also ask a Zief Librarian for advice specific to your topic.
California legislative history is much, much more difficult and time consuming than federal legislative history. For an idea of what is involved, take a look this Zief Library research guide on finding California legislative history. If you still want to proceed, we recommend that you schedule a consultation with a Zief research librarian.