Brecht, Richard D., Caemmerer, John, Walton, A. Ronald Russian in the United States,
National Foreign Language Center Monograph Ser., 1995, X, 211 с., 1-880671-04-2.
Brecht, Richard D., Caemmerer, John, Walton, A. Ronald .
Russian in the United States.
Washington, D. C.: National Foreign Language Center Monograph Ser., 1995, X, 211 с., 1-880671-04-2.
Brecht, Richard D., Caemmerer, John, Walton, A. Ronald (1995)
Russian in the United States,
Washington, D. C.: National Foreign Language Center Monograph Ser., X, 211 с., 1-880671-04-2
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