Yale Manuscripts & Archives hold collections of posters, photographs, and more, such as this example from the Immanuel Wallerstein Collection of African Liberation Posters.
To search in Orbis for material that you could write a proposal on, try subject words combined with such terms as "Sources," "Early works to 1800," "Correspondence," "Interviews," or "Personal narratives." For example,
Refugees--Somalia--Personal Narratives
Refugees--Somalia--Interviews
Background Information and analysis of constitutions
Actual Constitutional text
For searching in Quicksearch (this includes materials from the law library)
Try the subject search"
Constitutional history > Africa.
Constitutional law > Africa.
Elections:
General economic information:
Think Tanks