W. Wilfried Schuhmacher, F. Seto (Author)

Jacques Allières (Author)

Mary C. Iribarren-Argaiz (Author)

M. Zélikov (Author)

Jabier Alberdi Larizgoitia (Author)

José María Satrústegui (Author)

Patxi Salaberri Zaratiegi (Author)

José María Jimeno Jurío (Author)

Isaac Santesteban (Author)

Frantzisko Ondarra (Author)