TransliterationPrashkevich G. Krestovye pohody XI-XIII veka: Pes gospoden. Krestovye pohody v memuarah i dokumentah. In Russian
In EnglishPrashkevich Mr.. I.Mitropolskogo.- campaigns XI-XIII century: Dog the. I.Mitropolskogo.- campaigns in memoirs and documents. In Russian, n/a
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