Masiform D Fanzine
Masiform D was a Star Trek fanzine, established in 1971. It lasted 18 issues, with the final being published in 1998, along with three special supplementary issues: Threshold, One Way Mirror, and Knight of Shadows. You can read more about the production and distribution of the zine at Fanlore.
#01. January 1971 50 pages. Read online at Archive.org.
#02. March 1972 – 72 pages. Read online at Archive.org.
#03. September 1973 – 84 pages. Read online at Archive.org.
#04. April 1975 – 74 pages. Read online at Archive.org.
#05. December 1976 – 98 pages. Read online at Archive.org.
#06. July 1977 – 94 pages. Read online at Archive.org.
#07. July 1978 – 90 pages. Read online at Archive.org.
#08. February 1979 – 88 pages. Read online at Archive.org.
#09. August 1979 – 106 pages. Read online at Archive.org.
#10. May 1980 – 114 pages. Read online at Archive.org.
#11. February 1981 – 118 pages.
#12. February 1982 – 108 pages.
#13. September 1983 – 120 pages.
#14. May 1984 – 128 pages.
#15. May 1986 – 120 pages. Selected pages available at Fanlore.
#16. September 1988 – 106 pages. Selected pages available at Fanlore.
#17. September 1990 – 100 pages. Selected pages available at Fanlore.
#18. May 1998 – 88 pages. Selected pages available at Fanlore.
#19. Threshold – 1978, 112 pages. Read online at Archive.org.
#20. One Way Mirror – May 1980, 251 pages. Read online at Archive.org / text version at AO3.
#21. Knight of Shadows – May 1982, 116 pages. Read online at Archive.org.