• Beach tar contamination on the Qatari coastline of the Gulf 

      H., Al-Madfa; Abdel-Moati, M.A.R.; Al-Naama, A. ( Elsevier , 1999 , Article)
      Beach tar concentrations were measured along the Qatari coastlines. Tar concentrations, collected from 11 locations, varied in space and time with values ranging between 2 and 1132 g m−1 (average 290 g m−1) of beach front. ...