- Series: Purple and Gray Series Record # 39422
- Series Tags: antigravity (2), net guns (1), 22nd century (1), science fiction (1), future (1), New York City (1), aliens (1), Moon . (1), magnetics (1), rays (1), class conflict (1), mad scientist (1), vibration weapons (1), heat rays (1), class warfare (1), atomic power (1), atomic disintegration power (1), class society (1), ray guns (1), remote surveillance (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