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Ukrainian-Russian relations are the most important problem of national historiography. This handbook examines sources on economic and political ties, their most important forms and manifestations.

The sources are reviewed, classified, typified and systematised by problematic and thematic features. The documents of the judicial and administrative books of Ukraine are analysed, many of which are introduced into scientific circulation for the first time.

Significant attention is paid to such important issues as authenticity, reliability, representativeness, complexes of sources, problems of extracting information from them about real events, processes, and the extent to which they adequately reflect real historical reality.