I love these advertising pages in Warren magazines! This one is all Close Encounters and other UFO/Alien goodies! I used to have that Close Encounters one-shot magazine!
Page 49 starts off an article on Arnold Gillespie, who worked on the SFX for Forbidden Planet, among other movies. This tribute article includes quotes from people who worked with Gillespie, such as George Pal.
Gillespie's film career began in 1921, and included work on the Wizard of Oz and King Kong!