San Francisco 49ers history and moments throughout six decades of NFL photography are on display in MichaelZagaris' new photo book, "Field of Play: 60 Years of NFL Photography" (with text by longtime sportswriter Steve Cassady).
Read MoreSan Francisco 49ers history and moments throughout six decades of NFL photography are on display in MichaelZagaris' new photo book, "Field of Play: 60 Years of NFL Photography" (with text by longtime sportswriter Steve Cassady).
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