As I don't use Scott catalog, I can't say what of the three possible issues are refering you:
1957.- "Dia del Sello" (Stamp's day), hyenas.
1958.- "Pro Infancia" (For children), Cervantes & Don Quijote.
1959.- "Pro Infancia" (For children)Lope de Vega


Images from my 1996 Edifil Unificado Especializado, vol III. The values are stil in pesetas (166 pesetas = 1 €).
As you can see, all stamps of the same issue are listed together, regarless that they're "normal" or "semi-postal" (a term not used in W. Europe). This is the normal practice in most European catalogs.