"id","author_first1","author_last1","title","year","type","university","place","keyword0","keyword1","keyword2","keyword3","keyword4","keyword5","keyword6","keyword7","keyword8"
"1191","Richard N.","Tutwiler","Tribe, Tribute, and Trade: Social Class Formation in Highland Yemen","1987","dissertation","State University of New York-Binghamton","Ann Arbor","Agriculture","Customary","Honor","Law","Sharecropping","Shaykh","Tribal","Tribes","Tribute"