Introductory computer science courses. - William G. Bulgren; Gregory F. Wetzel (SIGCSE, 1982)

An introductory algorithm teacher. - William G. Bulgren; Rose M. Marra; Gregory F. Wetzel (SIGCSE, 1987)

Problems, problems, problems ... - Gregory F. Wetzel; William G. Bulgren (J. Syst. Softw., 1989)