Link: Internally Displaced Persons: Guide to Legal Information Resources on the Web
This is a very useful collection of international, national and regional documents and resources on "internally displaced persons" (or in plain-speak, migrants, undocumented persons, refugees, etc.). According to the United Nations, internally displaced persons (IDPs) are
persons or groups of persons who have been forced or obliged to flee or to leave their homes or places of habitual residence, in particular as a result of or in order to avoid the effects of armed conflict, situations of generalized violence, violations of human rights or natural or human-made disasters, and who have not crossed an internationally recognized State border" (Guiding Principles on Internal Displacement, 1998, Introduction, para. 2)..