73803873
Jun 1, 1989
Jan 7, 1992
VIDEO CASSETTES, SLIDES, AND TRANSPARENCIES IN THE FIELD OF VERBAL AND NON-VERBAL MEDIA COMMUNICATION
Electrical and Scientific ApparatusEDUCATIONAL SERVICES; NAMELY, CONDUCTING SEMINARS IN THE FIELD OF VERBAL AND NON-VERBAL MEDIA COMMUNICATION
Education and Entertainment