c211.
Mary Douglas (1970), Natural Symbols. Grid-group is developed in detail in Mary Douglas, “Cultural Bias”, Royal Anthropological Institute, Occasional Paper, 34, 1978, in Mary Douglas (1982), In the Active Voice, pp 183–254 (this article is the main source for the present discussion). See also Mary Douglas and Baron Isherwood (1979), The World of Goods, chapter 2; and Michael Thompson, Richard Ellis and Aaron Wildavsky (1990), Cultural Theory, chapter 1. NB. “Group and grid” is more generally known (in the textbooks) as grid-group.