"Historical Documents Writing having historical value (as opposed to fiction or myth etc.)
Source: WordWeb
Primary Sources- Primary Sources are original records created at the time historical events occurred or well after events in the form of memoirs and oral histories.  Source: ALA
Secondary Source-A Secondary source is something that has been made recently about the past. Source: History on the Net
"Research in the humanities involves different methods such as for example hermeneutics and semiotics, and a different, more relativist epistemology. Humanities scholars usually do not search for the ultimate correct answer to a question, but instead explore the issues and details that surround it. Context is always important, and context can be social, historical, political, cultural or ethnic. An example of research in the humanities is historical research, which is embodied in historical method. Historians use primary sources and other evidence to systematically investigate a topic, and then to write histories in the form of accounts of the past." Source: Wikipedia