Society for Psychical Research (SPR)

This is not a separate work: it is the Society for Psychical Research's own Psi Encyclopedia entry on the Society itself, one article inside the same continuously maintained online reference this atlas also records as a general source. It descends from that encyclopedia rather than standing beside it, so citing this entry alongside the general Psi Encyclopedia record, or alongside another of its articles, is one editorial voice, not corroboration. Its real limit is the encyclopedia's own limit: an organization's reference article about itself, not an outside, religiously neutral academic account. Use it for what this specific entry states about the Society's own history and structure; a claim needing independent scholarly assessment needs a source produced outside the Society.