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Sam sorts : (one hundred favorite things) / by Jocelyn, Marthe.;
Sam's things are in a mess. It is time to clean up the pile of stuff. As he tries to organize everything, he quickly realizes that all his things fit into categories, many of them in more than one.LSC
Subjects: Boys; Set theory; Categories (Mathematics); Similarity judgment;
Available copies: 1 / Total copies: 1
unAPI

Sorting with snakes / by McDonnell, Mary Rose.;
Includes bibliographical references (page 23), Internet addresses and index.LSC
Subjects: Set theory; Categories (Mathematics); Similarity judgment; Snakes;
Available copies: 1 / Total copies: 1
unAPI