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  1. JEGIAZARJAN, Beniamin Ovsepovič - PETROSJAN, El'mira Artašesovna. Effektivnost' naučno-techničeskogo progressa : Voprosy ocenki i planirovanija. 1. izd. Jerevan : Ajastan, 1988. 191 s. [Copy count : 1, currently available 1, at library only 0]
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