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Keys to management (Workbook) , Tests , [К учебнику "Keys to management" (of David Cotton)]

By Pyatigorsk state ling. univ. State service a. management dep..
Pyatigorsk ПГЛУ 2003 .
48 с. 21.
5-89966-386-3

By [G.R. Voskanyan, Z.G. Daramilova, N.A. Kambulatova].
Pyatigorsk Pyatigorsk univ. press 2002 .
205 с. , Рез. на рус. яз. 21.