%0 Journal Article %A Gilmore, P. C. %T Attributes, sets, partial sets and identity %J Compositio Mathematica %D 1968 %P 53-69 %V 20 %I Wolters-Noordhoff Publishing %U http://www.numdam.org/item/CM_1968__20__53_0/ %G en %F CM_1968__20__53_0