1.   Research materials will include national archive sources, local police record, and oral information.

2.   Archive sources have very special qualities, and should therefore lie at the heart of any attempt to use primary evidence in the history classroom.

3.   A second factor is the versatility of archive sources as a teaching resource.

4.   More recently, archive sources have also been used in newer computer formats, in databases, viewdata programmes or telex simulations for instance.

5.   Ziegler told the newspaper material from his research came from German archive sources such as the German Armaments Ministry.