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Nat͡sionalna konferent͡sii͡a po khimii͡a (1985- ) (1st 1985 Sofia, Bulgaria)
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Pŭrva Nat͡sionalna konferent͡sii͡a po khimii͡a, 26-28-XI-1985 g., Sofii͡a NDK "L. Zhivkova"
Vissheto khimichesko obrazovanie v Bŭlgarii͡a
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