Trefwoord: buitenaards leven (3 titels)
- Broeke, Robbert van den Robbert : van zorgenkind tot medium. 2e dr. ([2005])
- Denzler, Brenda The lure of the edge : scientific passions, religious beliefs, and the pursuit of UFOs (2001)
- The Gods have landed : new religions from other worlds. Ed. by James R. Lewis (1995)
© 2008 KNAW/Meertens Instituut