by NITTEL, FRITZ., 5000 KOELN, DE, RECKZIEGEL, ERICH., 5090 LEVERKUSEN, DE
Year of Publication 17.03.1983

by MATEJEC,REINHART,DR, NITTEL,FRITZ,DR, SOBEL,JOHANNES,DR
Year of Publication 17.02.1983

by RANZ,ERWIN,DR, NITTEL,FRITZ,DR, LANGEN,HANS,DR
Year of Publication 23.07.1981

by HIMMELMANN, WOLFGANG., 5670 OPLADEN, NITTEL, FRITZ, PELZ, WILLIBALD, SOBEL, JOHANNES., 5090 LEVERKUSEN
Year of Publication 26.02.1981

by MUELLER,ERICH,DR, TROMNAU,RUDOLF,DR, NITTEL,FRITZ,DR, HIMMELMANN,WOLFGANG,DR
Year of Publication 11.05.1989

by LOHMER,KARL,DR, KOLBERG,HELMUT, GREGORINTSCHITSCH,HORST, NITTEL,FRITZ,DR, JUNKERS,GUENTHER,DR
Year of Publication 09.02.1989

by NITTEL, FRITZ, LIEBE, WERNER, MADER, HELMUT
Year of Publication 05.12.1990

by HIMMELMANN, WOLFGANG, NITTEL, FRITZ, RANDOLPH, HARTMUT
Year of Publication 31.10.1990

by SOBEL, JOHANNES, NITTEL, FRITZ, LIEBE, WERNER
Year of Publication 26.09.1990

by NITTEL, FRITZ, LIEBE, WERNER, MADER, HELMUT
Year of Publication 01.08.1990

by WEDEMEYER; KARLFRIED, KLEIN; ALFONS, CREDNER; HANS-HEINRICH, SCHULTE; WALTER, PELZ; WILLIBALD, NITTEL; FRITZ
Year of Publication 02.03.1976

by SCHULTE, WALTER, BOIE, IMMO, NITTEL, FRITZ, PELZ, WILLIBALD, KRIMM, HEINRICH, FREITAG, DIETER
Year of Publication 27.01.1976

by SCHULTE, WALTER, NITTEL, FRITZ., 5000 KOELN, MAEDER, HELMUT, RECKZIEGEL, ERICH, PELZ, WILLIBALD
Year of Publication 25.09.1975

by SCHULTE, WALTER, WEDEMEYER, KARLFRIED, CREDNER, HANS-HEINRICH, NITTEL, FRITZ, PELZ, WILLIBALD, KLEIN, ALFONS
Year of Publication 17.06.1975

by SOBEL, JOHANNES, NITTEL, FRITZ, LIEBE, WERNER
Year of Publication 13.12.1989

by FRITZ NITTEL, JOHANNES SOBEL, WOLFGANG HIMMELMANN, MANFRED KREUDER, WILLIBALD PELZ, WOLFGANG METZNER
Year of Publication 29.08.1972

by MEYER,RUDOLF,DR, NITTEL,FRITZ,DR, ROSENHAHN,LOTHAR,DR, HIMMELMANN,WOLFGANG,DR
Year of Publication 06.02.1986

by JUNKERS, GUENTHER., 5090 LEVERKUSEN, DE, KOLBERG, HELMUT, 5090 LEVERKUSEN, DE, LOHMER, KARL., 5090 LEVERKUSEN, DE, NITTEL, FRITZ., 5090 LEVERKUSEN, DE, GREGORINTSCHITSCH, HORST, (GRAD.), 5000 KOELN, DE
Year of Publication 17.10.1996

by PELZ,WILLIBALD,DR, NITTEL,FRITZ,DR, KUNITZ,FRIEDRICH-WILHELM,DR
Year of Publication 31.03.1971

by PELZ,WILLIBALD,DR, NITTEL,FRITZ,DR, KUNITZ,FRIEDRICH-WILHELM,DR
Year of Publication 25.02.1971