Abou-State
[Contributor];
Amine, M
[Contributor];
Berger, Werner
[Contributor];
Bonatz, Eckhard
[Contributor];
Christo, Becev
[Contributor];
Correns, Erich
[Editor];
Dimov, Kiril
[Contributor];
El-Megei, Abd
[Contributor];
Fouad, F
[Contributor];
Georgiev, Janko
[Contributor];
Heilmann, Gerhard
[Contributor];
Mertel, Horst
[Contributor];
Purz, Hans Joachim
[Contributor];
Rafler, Gerald
[Contributor];
Reinisch, Gerhard
[Contributor]