@book {1668,
	title = {The development, implementation, and evaluation of a computer-assisted branched test for a program of individually prescribed instruction},
	year = {1969},
	address = {Doctoral dissertation, University of Pittsburgh. Dissertation Abstracts International, 30-09A, 3856. (University Microfilms No. 70-4530).},
	author = {Ferguson, R. L.}
}
