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Kent, Matthew W., Harbor Defenses of San Francisco - A Field Guide 1890 to 1950, Second Edition, Jun 2011, Blurb, ISBN 978-1-4507-8265-4
Kent, Matthew W., Harbor Defenses of San Francisco - A Field Guide 1890 to 1950, Second Edition, Jun 2011, Blurb, ISBN 978-1-4507-8265-4