1. Abt, Clark C.: An Educational System Planning Game, Cambridge, Mass.: Abt Associates, Inc. 1965 (mimeo)
2. Abt, C.: Heuristic games for secondary schools, Cambridge, Mass.: Abt. Ass., Inc. 1965
3. Abt, C.: The rediscovery of exploratory play, problem solving and heuristic gaming as a more serious form of education, paper read at the Conference of Innovation in Education, Lake Arrowhead, Dec. 1965
4. Abt, C.: Games for Learning, Cambridge, Mass.: The Social Studies Curriculum Project, Educational Services Incorporated, Occasional Paper no. 7, 1966
5. Abt Ass., Inc.: Examples of Educational Games, Cambridge, Mass.: Abt. Ass. 1966