Williams, Thomas Rhys Field methods in the study of culture. New York, Holt, Rinehart and Winston [c1967] viii, 76 p. 24 cm. (Studies in anthropological method) Bibliografía: p. 67-76 <a id= "rdfa" about="http://bnjm.sld.cu/cgi-bin/item.py?idficha=bcuhcgrlyfof1100422" property = "oa:link" href="http://www.worldcat.org/oclc/253551152">WorldCat</a>