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1Publicado 1989Moskva : In-t ėkonomiki AN SSSR, 1989.203 p. : ill. ; 20 cm.Subjects: “...Industrial productivity Germany (East) Congresses....”
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2Publicado 1987Moskva : Akademi︠i︡a nauk SSSR, In-t ėkonomiki, 1987.2 v. ; 21 cm.Subjects: “...Technological innovations Economic aspects Germany (East) Congresses....”