- Series: 20,000 A.D. Series Record # 9897
- Series Tags: time portal (2), antigravity (1), Neptune (1), Neptunians (1), Earhtmen Neptune colony (1), telepathy (1), thought screen (1)
- 20,000 A.D.
- 1
In 20,000 A.D.! (1930) [SF]
by
Nat Schachner
and
Arthur Leo Zagat
only appeared as:
- Variant: In 20,000 A.D.! (1930) [as by Nat Schachner and Arthur L. Zagat]
- Variant: In 20,000 A.D. (2017)
- 2 Back to 20,000 A.D. (1931) [SF] by Nat Schachner and Arthur Leo Zagat [also as by Nathan Schachner and Arthur L. Zagat]
- 1
In 20,000 A.D.! (1930) [SF]
by
Nat Schachner
and
Arthur Leo Zagat
only appeared as: