Look your scholars up in these databases. Look for articles or books by them, and for reviews of their work by other scholars. Google them as well to see what kind of scholar they are, and where they got their degrees:
Example: Africa in the Time of Cholera: A History of Pandemics From 1817 to the Present, by Myron Echenberg
Group 1 Africa in World History: From Prehistory to the Present, by Erik Gilbert and Jonathan T. Reynolds
Group 2 Problems in the History of Colonial Africa, 1860-1960, edited by Robert O. Collins
Group 3 Let Freedom Come: Africa in Modern History, by Basil Davidson
Group 4 Understanding Contemporary Africa, by edited by April A. Gordon & Donald L. Gordon
Group 5 Colonial Africa, by A.J. Christopher
Group 6 The Kingdom of Kongo: Civil War and Transition, 1641-1718, by John K. Thornton
Group 7 Sub-Saharan Africa: An Environmental History, by Gregory H. Maddox
Group 8 The Peopling of Africa: A Geographic Interpretation, by James L. Newman
Group 9 A History of African Societies to 1870, by Elizabeth Isichei
Use Historical Abstracts, Academic Search Complete, or Worldwide Political Science Abstracts to find 2 articles and use IDS Search to find 2 books on the topic you've decided to research (or that you have been assigned in class).
Use THIS GOOGLEDOC to record information about what you find.
Group 1: Use of Oral History or Oral Tradition in African Environmental History
Group 2: Human/environment Relationships
Group 3: Food Ways/Food production in Africa
Group 4: African memory and landscapes
Group 5: Colonialism and Environmental History
Group 6: Conservation in African history
Group 7: Pastoralism in Africa
Group 8: Sacred places and spaces
Group 9: Health, healing, and medicine
Group 10 Social justice and the environment