الإتاحة: http://hdl.handle.net/10150/624350Testhttp://arizona.openrepository.com/arizona/handle/10150/624350Test
الإتاحة: http://hdl.handle.net/10150/622147Testhttp://arizona.openrepository.com/arizona/handle/10150/622147Test
الإتاحة: http://hdl.handle.net/1903/3530Test
الإتاحة: http://hdl.handle.net/2152/1949Test
الإتاحة: http://repositories.lib.utexas.edu/bitstream/handle/2152/1949/kimd00025.pdfTest
الإتاحة: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624564Test