by SCHAEFER W,DT
Year of Publication 19.06.1973

by SCHAEFER W,DT
Year of Publication 03.04.1973

by SCHAEFER W,DT, HACK H,DT, EUE L,DT
Year of Publication 06.05.1974

by DINTER M,DT, KUHLMANN SCHAEFER W,DT
Year of Publication 04.12.1973

by SCHAEFER W,DT, SASSE K,DT, HACK H,DT, EUE L,DT
Year of Publication 25.09.1973