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San Francisco Seals (PCL) - Wikipedia
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San Francisco Seals (soccer) - Wikipedia
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The old Pacific Coast League.
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2007.1.291 OMCA COLLECTIONS
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Los Angeles Angels (PCL), Pro Sports Teams Wiki
Old Ballparks
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MLB: The Defunct Saga - Bibliography Added - Page 11 - Concepts
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san francisco seals - AbeBooks
The PCL: San Francisco Seals – Ebbets Field Flannels
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Pacific Coast League, Baseball Wiki
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Pacific Coast Baseball News June 10, 1949 (Vol 3, No. 5)
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List of baseball parks in Oakland, California - Wikiwand