TY - JOUR TI - Educational technology research and development: ET R & D CY - Wien [u.a.] PB - Springer PY - 1989 N1 - Automatically generated record. (Updated: 2025-01-06) KW - Communication (ASJC) KW - Education (ASJC) UR - https://juser.fz-juelich.de/record/81970 ER -