1. THE PHOTOGRAPHER OF THE TRANSYLVANIAN ORGAN LANDSCAPE – ORGAN PHOTOS MADE BY DEZSŐ BUZOGÁNY (MOSAICS, NOT ONLY FROM MUSIC)/AZ ERDÉLYI ORGONATÁJ FOTOGRÁFUSA – BUZOGÁNY DEZSŐ ORGONAKÉPEI (MOZAIKOK, NEM CSAK ZENÉRŐL). Authors: DÁVID ISTVÁN.2. THE ORGAN BUILDING ART IN THE HUNGARIAN REFORMED CHURCH. Authors: DÁVID ISTVÁN.