A study of the tasks performed and competencies needed by public high school principals of North Sumatra Indonesia with the implications for the improvement of programs for preparing principals - Situmorang, Alboin Oloan Binsar (Ann Arbor, Mich. : University Microfilms International, 1970)
Thesis (Ed.D.) - State University of New York at Albany, 1970
Keywords: School management and organization -- Indonesia; High School principals -- North Sumatra (Province); High school -- Indonesia -- North Sumatra (Province)