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.
This signature is believed to be ineligible for
copyright and therefore in the public domain because it falls below the required level of originality for copyright protection both in the United States and in the source country (if different). In this case, the source country (e.g. the country of nationality of the signatory) is believed to be United States of America.
Note that this tag cannot be used on all signatures, as not all signatures are copyright-free.
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.
This signature is believed to be ineligible for
copyright and therefore in the public domain because it falls below the required level of originality for copyright protection both in the United States and in the source country (if different). In this case, the source country (e.g. the country of nationality of the signatory) is believed to be United States of America.
Note that this tag cannot be used on all signatures, as not all signatures are copyright-free.