This work is in the public domain because it was published in the United States between 1978 and March 1, 1989 without a copyright notice, and its copyright was not subsequently registered with the U.S. Copyright Office within 5 years. Unless its author has been dead for several years, it is copyrighted in the countries or areas that do not apply the rule of the shorter term for US works, such as Canada (70 pma), Mainland China (50 pma, not Hong Kong or Macau), Germany (70 pma), Mexico (100 pma), Switzerland (70 pma), and other countries with individual treaties. See this page for further explanation. Deutsch ∙ English ∙ español ∙ français ∙ italiano ∙ 日本語 ∙ 한국어 ∙ македонски ∙ português ∙ português do Brasil ∙ русский ∙ sicilianu ∙ slovenščina ∙ 中文（简体） ∙ 中文（繁體） ∙ +/−

Transferred from en.wikipedia to Commons by Innotata using CommonsHelper.

• 2011-01-30 16:53 Mariomassone 352×560× (239046 bytes) {{PD-US-1989}} {{Information |Article = Brown Rat |Description = Skull of brown rat |Source = The contemporary land mammals of Egypt (including Sinai) (1980) by Dale J. Osborn and Ibrahim Helmy (see here http://www.archive.org/details/contemporaryland05osbo for copyright status) |Date = 1980 |Author = Dale J. Osborn and Ibrahim Helmy |Portion = |Low_resolution = Lower than original |Purpose = Illustrate the skull of this rat species |Replaceability = |other_information = }}