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Yakovlev Yak-130 Yakovlev Yak-38 Yakov Mikhailovich Sverdlov Yakovlev Yakovlev Yak-9 Yakov Iosifovich Dzhugashvili Yakovlev Yak-141 Yakovlev Yak-3 Yakovlev Yak-1 Yakovlev Yak-23Tài liệu tham khảo
WikiPedia: Yakov_Mikhailovich_Sverdlov http://aleph.nkp.cz/F/?func=find-c&local_base=aut&... http://catalogue.bnf.fr/ark:/12148/cb17789743c http://data.bnf.fr/ark:/12148/cb17789743c http://www.idref.fr/132528460 http://id.loc.gov/authorities/names/n81117223 http://d-nb.info/gnd/118758004 http://isni-url.oclc.nl/isni/0000000080977014 http://marxists.org/archive/trotsky/1925/03/sverdl... http://scireg.informika.ru/text/magaz/newpaper/mes... http://www.litrossia.ru/article.php?article=126