Https://ppf.ucsf.edu/sites/ppf.ucsf.edu/files/webform/list-of-official-copyright-customer-usa-contact-numbers-the-full-detailed-guide.pdf https://ppf.ucsf.edu/sites/ppf.ucsf.edu/files/webform/list-of-official-copyright-customer-usa-contact-numbers-the-full-detailed-guide.pdf