- Script
- José García
- Pencils
- José García
- Inks
- José García
- Letters
- typeset
- Editing
- ? (original editor)
- Genre
- horror-suspense
- Reprints
- from Zombie (Petronio, 1973 series) #1 (July 1973) [as Sangre y lágrimas]
"© Ediciones Petronio, S.A./The Illustrated—Barcelona"
- Script
- ?
- Pencils
- Josar (signed)
- Inks
- Josar (signed)
- Letters
- ?
- Editing
- ? (original editor)
- Genre
- horror-suspense
- Reprints
- from Zombie (Petronio, 1973 series) #4 [as Los dos sobres]
"© Ediciones Petronio, S.A./The Illustrated—Barcelona"