found: Aggression and war, 1989:CIP t.p. (J. Groebel) galleys (Post-grad. Program in Communication Psychology, Erziehungswissenschaftliche Hochschule, Rheinland-Pfalz, Landau, W. Germany)
found: LC data base, 6/14/88(hdg.: Groebel, Jo; usage: Jo Groebel)
found: Gewaltprofil des deutschen Fernsehprogramms, 1993:t.p. (Jo Groebel) verso t.p. (b. 1950; prof., Institut für Psychologie der Massenkommunikation & Public Relations der Universität Utrecht)
found: Das neue Fernsehen, 2014:t.p. (Jo Groebel) verso (director of the Deutsches Digital Institut Berlin) p. 195 (Prof. Dr. Jo Groebel b. 11.11.1950 in Jülich)
found: Catalogus Professorum Academiae Rheno-Traiectinae, viewed November 13, 2024(F.J. (Franz-Josef) Groebel ; professor of psychology, appointed 1999 ; afterwards became general director of the European Institute of Media ; born 11 November 1950 in Jülich, Germany) - https://profs.library.uu.nl/index.php/profrec/getprofdata/723
