@incollection{, 9983B3589CF7BF57185EB1BB053CE04E , author={{Mr.R.K.Abdulrahman} and {koya university}}, journal={{Global Journal of Researches in Engineering}}, journal={{GJRE}}2249-45960975-586110.34257/gjre, address={Cambridge, United States}, publisher={Global Journals Organisation}12216 } @book{b0, , author={{ MStewart } and { KArnold }} , title={{Gas Sweetening and Processing Field Manual. Waltham: Gulf professional publishing}} , year={2011} } @book{b1, , title={{Petroleum production engineering: a Computer-assisted approach}} , author={{ BWilliam } and { AGhalambor }} , year={2007} , publisher={Gulf Professional Publishing} , address={Oxford} } @book{b2, , author={{ JCarroll }} , title={{Natural Gas Hydrates: A Guide for Engineers}} Oxford , publisher={Gulf Professional Publishing} , year={2009} }