The Sign Historical Group or SHG is an association of scholars and researchers who promote the discovery and preservation of materials regarding the history of the UFO phenomenon, and the production and dissemination of publications regarding the history of the UFO phenomenon, as well as the institutions and persons who investigated it. This is managed in the traditional manner of historians and archivists working on a subject of widespread public interest and cultural impact. They work on the subject of the UFO phenomenon with governmental, military, and academic concerns, folklore and popular culture, technological advances, and those aspects of the human, technical, and natural landscapes which may serve to illuminate the history of the UFO phenomenon and our various human responses to it. The 

https://www.project1947.com/shg/