Selma K. Moon, age 90, of San Antonio, died Thursday, November 19, 1992.  Mrs. Moon was a life long member of St. John's Lutheran church and Zion Lutheran Church of Helotes. She is preceded in death by her husband ............ Moon and a son, ........... Moon (part of microfilm copy of newspaper unreadable).  Survivors; son and daughter-in-law, John A. and Betty Ann Moon, Angel Fire, NM; grandaughters, Stephanie Moon-Kellett, Dallas, TX, Melanie Jo Moon, London, United Kingdom; sister, Mrs. R.P. (Tekla) Brown, San Antonio; brother, Marvin Kirchhoff, Pampano Beach, FL; several nieces and nephews. The family will receive frinds between 6 o'clock and 8 o'clock Monday evening at Porter Loring.