- Script
- Manuel Medina
- Pencils
- Carlos Giménez [as Carlos] (signed)
- Inks
- Carlos Giménez [as Carlos] (signed)
- Letters
- ?
- Editing
- Selecciones Ilustradas (syndication)
- Genre
- velho oeste (western-frontier)
- Reprints
This might not be the first printing of this Spanish story "El duelo", but it is the earliest identified to date.