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Richard Arthur Norton (1958- ): Thorvald Martin Tandberg (1874-1970) in the 1875 Norway census
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Richard Arthur Norton (1958- ): Andreas Thorsen Tandberg (1846-1910) and family in 1883
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Richard Arthur Norton (1958- ): Thorvald Martin Tandberg (1874-1970) in the 1900 Norway census
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Richard Arthur Norton (1958- ): Thordis Tandberg (1905-1919); Thorvald Martin Tandberg (1874-1970); Ralph Christian Andreas Tandberg (1901-1995); Carl Frederick Tandberg (1910-1988); Yolanda Christina Tandberg (1902-2003); and Alvilde Marie Naess (1875-1933) circa 1910-1911
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Richard Arthur Norton (1958- ): Carl Frederick Tandberg (1910-1988) and family in 1918.
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Richard Arthur Norton (1958- ): Thorvald Martin Tandberg (1874-1970) in the World War I draft
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Richard Arthur Norton (1958- ): Carl Frederick Tandberg (1910-1988) in the 1920 US census in Boston, Massachusetts
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Richard Arthur Norton (1958- ): Thorvald Martin Tandberg (1874-1970) arriving in New York City on August 15, 1930
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Richard Arthur Norton (1958- ): Thorvald Martin Tandberg (1874-1970) as a crew member aboard the ship "Washington" on August 15, 1930
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Richard Arthur Norton (1958- ): Thorvald Martin Tandberg (1874-1970) circa 1950-1960
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Richard Arthur Norton (1958- ): Thorvald Martin Tandberg (1874-1970) circa 1955
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Richard Arthur Norton (1958- ): Thorvald Martin Tandberg (1874-1970) family history research circa 1960