From LCCN: Aliens arrive on Earth in an UFO and enlist the help of a pair of telepathic twins in their search for an earthly substance to save their dying race.
Source · ISFDB CC BY 4.0
From LCCN: Aliens arrive on Earth in an UFO and enlist the help of a pair of telepathic twins in their search for an earthly substance to save their dying race.
Source · ISFDB CC BY 4.0