Q. How can I find business directory information for the Conejo Valley that pre-dates the Special Collections data?

In Local History there are business directories back to 1964, and telephone directories back to 1976. You can search the Conejo Valley Business Directories here:  https://www.tolibrary.org/research/special-collections-home/local-history-collection/historic-conejo-business-directories

Before 1964 there is no separate Conejo/Thousand Oaks directory, instead, listings would be for Ventura County. The Ventura Directories are available in microfilm, please request them at the Reference Desk (Not available at Newbury Park).