nuc86-54521: His Classrooms, 1983 (hdg. on VtU rept.: Kounin, Jacob S. (Jacob Sebatian), 1912- ; usage: Jacob S. Kounin)

LC data base, 1/7/88 (hdg.: Kounin, Jacob Sebatian, 1912- ; usage: Jacob S. Kounin)

Social Security Death Index, viewed Aug. 12, 2009 (Jacob. S. Kounin, b. Jan. 17, 1912; d. Oct. 7, 1995)

OCLC, Aug. 12, 2009 (hdg.: Kounin, Jacob S. (Jacob Sebatian), 1912-1995; Kounin, Jacob Sebatian, 1912- ; Kounin, Jacob S., 1912- ; usage: Jacob S. Kounin; J.S. Kounin)