- Series: H. G. Wells: Critic of Progress Series Record # 34094
- H. G. Wells: Critic of Progress
- The Limits of Progress: Cosmic (1973) [ES] by Jack Williamson
- A Man Ahead of His Century (1973) [ES] by Jack Williamson
- The Liberation of a Mind (1973) [ES] by Jack Williamson
- The Limits of Progress: Human (1973) [ES] by Jack Williamson
- Beyond These Limits (1973) [ES] by Jack Williamson
- In Another Century (1973) [ES] by Jack Williamson