- Series: Random Factors: Letters Series Record # 38412
- Random Factors: Letters
- Random Factors: The Readers (Algol 21, November 1973) (1973) [ES] by Andrew Porter [only as by uncredited]
- Random Factors: Letters (Algol, Summer 1975) (1975) [ES] by Andrew Porter
- Random Factors: Letters (Algol, Winter 1976) (1976) [ES] by Andrew Porter
- Random Factors: Letters (Algol, Fall 1976-Winter 1977) (1976) [ES] by Andrew Porter
- Random Factors: Letters (Algol, Summer-Fall 1977) (1977) [ES] by Andrew Porter
- Random Factors: Letters (Algol, Spring 1978) (1978) [ES] by Andrew Porter
- Random Factors: Letters (Starship, Spring 1979) (1979) [ES] by Andrew Porter
- Random Factors: Letters (Starship, Fall 1979) (1979) [ES] by Andrew Porter
- Random Factors: Letters (Starship, Winter 1979-1980) (1980) [ES] by Andrew Porter
- Random Factors: Letters (Starship, Spring 1980) (1980) [ES] by Andrew Porter
- Random Factors: Letters (Starship, Summer 1980) (1980) [ES] by Andrew Porter
- Random Factors: Letters (Starship, Fall 1980) (1980) [ES] by Andrew Porter
- Random Factors: Letters (Starship, Spring 1981) (1981) [ES] by Andrew Porter
- Random Factors: Letters (Starship, Summer-Fall 1981) (1981) [ES] by Andrew Porter