Image: U.S. Custom House (San Ysidro, California) front

Description: U.S. Custom House (San Ysidro, California) looking north at the west and south façades
Title: U.S. Custom House (San Ysidro, California) front
Credit: National Register of Historic Places, National Park Service http://pdfhost.focus.nps.gov/docs/NRHP/Photos/83001228.pdf
Author: National Register of Historic Places, National Park Service
Permission: 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 (50 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.
Usage Terms: Public domain
License: Public domain
Attribution Required?: No