All TTHA world wide web pages are protected by international copyright legislation. Any use of information stored on this site or any of its divisions must be in compliance with copyright laws.

TTHA herewith grants permission to reproduce electronically and/or in print items that are their intellectual property for non-commercial purposes only. Any piece of information so duplicated must be accredited to TTHA and carry the line “© TTHA, 1997. Reproduced by permission.” on the first page of each reproduction.

Items on any of our pages that are not in the possession of TTHA are exempted from this permission. Their reproduction must be sanctioned by the respective copyright holder.

With regard to the use of TTHA material through Internet hyperlinks to any part of the TTHA web site, such use is only permissible if TTHA pages are displayed unframed by any other web page, and the TTHA URL is clearly visible on all web pages so displayed. TTHA does not sanction image links made to any illustration stored on our web site from pages that do not form part of our project.

For U.S. Copyright see: Bitlaw: Copyright Law in the U.S.