- Series: Space Corporation Series Record # 7394
- Space Corporation
- 1 Never the Same Door (1967) by Douglas R. Mason [only as by John Rankine]
- 2
Moons of Triopus (1968)
by
Douglas R. Mason
only appeared as:
- Variant: Moons of Triopus (1968) [as by John Rankine]
-
Translation: Månar över Triopus?Maanar över Triopus[Swedish] (1971) [as by John Rankine]
- Translation: Die Telepathen-Kolonie [German] (1976)
- 3 Binary Z (1969) by Douglas R. Mason [only as by John Rankine]