Helal, Ahmed H.
[Other];
White, Herbert S.
[Honoree];
Helal, Ahmed H.
[Editor]
;
Universitätsbibliothek Essen,
International Essen Symposium 15 1992 Essen
Helal, Ahmed H.
[Other];
Wolf, D.
[Other];
Jeffreys, A. E.
[Other];
Helal, AhmedHelmi
[Editor];
Barnholdt, Bent
[Other]
;
Gesamthochschulbibliothek Essen,
Essen Symposium 3 1980
Bonness, Elke
[Author];
Delbrück, B.
[Author];
Goossens, Paula
[Author]
;
Helal, Ahmed H.
[Editor];
Weiss, Joachim W.
[Editor]Gesamthochschulbibliothek Essen,
INTERMARC Group Software Subgroup,
Library Systems Seminar 4 1981 Essen
Wilfrid
[Author]
;
Helal, Ahmed H.
[Other];
Lancaster, Frederick Wilfrid
[Honoree];
Helal, AhmedHelmi
[Editor];
Lancaster, F. Wilfrid
[Honoree];
Weiss, Joachim W.
[Other]Universitätsbibliothek Essen,
International Essen Symposium 17 1994 Essen
Helal, Ahmed H.
[Other];
Beckman, Margaret
[Honoree];
Weiss, Joachim W.
[Other]
;
Universitätsbibliothek Essen,
International Essen Symposium 13 1990 Essen
Helal, Ahmed H.
[Other];
Weiss, Joachim W.
[Other];
Bivins Noerr, Kate
[Other];
Helal, Ahmed H.
[Editor];
Bivins Noerr, Kathleen
[Other]
;
Gesamthochschulbibliothek Essen,
Essen Symposium 8 1985