1. The Professional Stranger: An Informal Introduction to Ethnography;Agar,1980
2. Dimensions of similarity;Attneave;American Journal of Psychology,1950
3. Cups and glasses: Learning that boundaries are vague;Anderson;Journal of Child Language,1975
4. Word, Object, and Conceptual Development;Anglin,1977
5. Ethnomineralogy of Ticul, Yucatan potters: etics and emics;Arnold;American Antiquity,1971