The practices of media personnel regarding the duplication of copyrighted materials were studied through an opinionnaire designed to elicit responses (yes/no/perhaps) to 24 hypothetical work situations involving the possible duplication of seven categories of copyrighted media: film, filmstrips, videotapes, records, audio tapes, slide/tape series, and printed matter. The opinionnaire was distributed to those who attended the Ninth Annual Educational Media and Technology Conference, July 22-24, 1974, at the University of Wisconsin - Stout, Menomonie, Wisconsin. Over 160 responses came from media and library personnel of all professional levels, as well as from graduate students, teachers, and media sales representatives. Responses were tabulated by type of media in question and by professional status of the respondent. It was concluded that reproduction would have occurred in the majority of cases. Learning resource directors were the group most willing to reproduce all types of copyrighted media; library directors and salesmen were in the groups least likely to do so. Audio tapes were the media most frequently copied; films and slide/tapes, the least frequently copied. This report includes a literature review on copyright principle and legislation. (SL)