Far and extreme ultraviolet spectroscopy with ORFEUS: the guest investigator program during the 2. mission - Krämer, Gerhard; Appenzeller, Immo; Krautter, Joachim; Mandel, Holger (Abstracts of contributed talks and posters presented at the Joint Scientific Fall Meeting of the Astronomische Gesellschaft and of the Arbeitsgemeinschaft Extraterrestrische Forschung (AEF/DPG) at Bonn, 1995)