- Series: Purple and Gray Series Record # 39422
- Series Tags: antigravity (2), class society (1), heat ray (1), paralysis ray (1), thought machine (1), disintegrator rays (1), anticohesion rays (1), vibration death (1), moon (1), vibration rays (1), vibrations (1), robots (1), rocket cars (1), videotelephony (1), remote surveillance (1), ray guns (1), class conflict (1), 22nd century (1), science fiction (1), future (1) and 12 additional tags. View all tags for Purple and Gray
- Purple and Gray
- 1 Gray Denim (1930) [SF] by Harl Vincent
- 2 Power (1932) [SF] by Harl Vincent
- 3 Master Control (1940) [SF] by Harl Vincent