Historical Societies:
Contra Costa Historical Society
Cowell Lime Works Historic District
Government Agencies:
City of Concord - Reuse Project
Other Agencies:
Mount Diablo Interpretive Association
Rootsweb - USGenWeb: Contra Costa
Technical References
Newspapers:
Libraries:
Blogs:
Old Train System of Contra Costa County
You Know You’re From Concord, CA
Lisa Vorderbrueggen - Inside Politics
Print and other non-linked sources
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