Repertorium bibliographicum in quo Borisii Ottokaris Unbegaun opuscula omnia usque ad A.D. MCMLVIII conscripta et typis expressa accuratissime enumeranturBoris Ottokar Unbegaun · First published 1959Open the Tome
The Oxford Russian dictionaryMarcus Wheeler, Boris Ottokar Unbegaun, P. S. Falla, Della Thompson · First published 2000Open the Tome
Drei russische Grammatiken des 18. JahrhundertsBoris Ottokar Unbegaun · First published 1969Open the Tome
A bibliographical guide to the Russian languageBoris Ottokar Unbegaun · First published 1953Open the Tome
La " Javka" dans la pratique judiciaire russe du XVIIe siecleBoris Ottokar Unbegaun · First published 1950Open the Tome
Trud Zakharīi Orfelina o Petri︠e︡ Velikom i ego peterburgskoe izdanīeBoris Ottokar Unbegaun · First published 1938Open the Tome
Catalogue des périodiques slaves et relatifs aux études slaves des bibliothèques de ParisBoris Ottokar Unbegaun · First published 1929Open the Tome
