@inbook {1973,
	title = {Adaptive Branching in a Multi-Content Achievement Test},
	year = {1977},
	address = {D. J. Weiss (Ed.), Proceedings of the 1977 Computerized Adaptive Testing Conference. Minneapolis MN: University of Minnesota, Department of Psychology, Psychometric Methods Program},
	author = {Pennell, R. J. and Harris, D. A.}
}
