@book {TN_libero_mab2,
author = { Bălgarska akademija na naukite Sendov, Blagovest },
title = { Academicians and corresponding members 1869 - 1984 },
publisher = {Publ. House of the Bulgarian Academy of Sciences},
year = {1989},
address = { Sofia },
url = { http://slubdd.de/katalog?TN_libero_mab2 }
}
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