What has the author Antonio Ribera written?

Answer 1

Antonio Ribera has written:

'Los doce triangulos de la muerte' -- subject(s): Curiosities and wonders

'El dia dels mutants'

'El Misterio De Ummo/Mystery of the Planet Ummo (Otros mundos)'

'La Dimension Perdidau'

'Ummo'

'?De veras los OVNIS nos vigilan?' -- subject(s): Unidentified flying objects

'Secuestrados Por Extraterrestres'

'L' altra banda del mirall' -- subject(s): Occultism