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.
