Hits 1-2 within 2 documents
Hits 1-2 within 2 documents
Author(s): Porst, Rolf; Zeifang, Klaus; Koch, Achim
Source: ZUMA Nachrichten, 11 (1987) 20. p.8-31
Author(s): Porst, Rolf; Prüfer, Peter; Wiedenbeck, Michael; Zeifang, Klaus.- 1985. 54,2p.