Bralewski, Tomasz, and Roman Hołubowicz. 2005. “THE ROLE OF RADIO AND TELEVISION COMMERCIALS AND INTERNET IN THE PROMOTION ACTIVITIES OF SEED COMPANIES ON POLISH MARKET”. Acta Scientiarum Polonorum. Oeconomia 4 (2):17-26. https://aspe.sggw.edu.pl/article/view/926.