Primary Sources are records of events or evidence as they are first described or actually happened without any interpretation or commentary. It is information that is shown for the first time or original materials on which other research is based.
Examples
Original written works (poems, diaries, court records, interviews, surveys, original research or fieldwork, research published in a peer-reviewed journal)
Secondary Sources offer an analysis or restatement of primary sources. They often try to describe or explain primary sources. They tend to be works which summarize, interpret, reorganize, or otherwise provide an added value to a primary source.
Examples
Reference materials (dictionaries, almanacs, encyclopedias, textbooks)
Books and articles that interpret, analyze, critique, or review original fieldwork
Their site is packed with current news, planning information and data from the menu on the top bar. Some helpful sections are linked below.