When working on a research paper, project or presentation you may find material, whether in an archive or online, that you want to include. But whether it is ok to do so must be determined on a case-by-case basis. There is no standard answer to this question. You will need to investigate a little further by answering the following questions:
Step 1: Determine the status. To help you determine if the item is protected under Copyright or is it in the Public Domain use this Copyright Term and The Public Domain chart created by Peter Hirtle at Cornell University
Step 2: Explore exemptions to Copyright Law that might allow you to use the material. Exemptions to Copyright Law allow for materials to be used in ways that do not infringe on Copyright. The Fair Use Doctrine is just such an exemption and if often used by students and teachers for educational purposes.
Step 3: Ask permission. If it is still covered under Copyright, you need to ask permission to use it.