@misc{weko_37717_1,
   author	 = "Kashcheeva,Mila and Tsui,Kevin K.",
   title	 = "Why do oil importers diversify their import sources politically? : evidence from U.S. firm-level data",
   howpublished	 = "application/pdf",
   month	 = "feb",
   year 	 = "2014"
}