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| 2008 | ||
|---|---|---|
| 3 | Peter B. Hirtle: Copyright Renewal, Copyright Restoration, and the Difficulty of Determining Copyright Status. D-Lib Magazine 14(7/8): (2008) | |
| 2006 | ||
| 2 | Peter B. Hirtle: Author Addenda: An Examination of Five Alternatives. D-Lib Magazine 12(11): (2006) | |
| 1990 | ||
| 1 | Peter B. Hirtle: Regarding Allen Veaner's letter. JASIS 41(6): 427 (1990) | |
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