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Books about Rachkovsky:
THE SEASONS/ ILYA RACHKOVSKY by PETER ILYICH TCHAIKOVSKY [Korean Imported] (2008) by PETER ILYICH TCHAIKOVSKY (0100)
Wiki information Rachkovsky:
Pyotr Ivanovich Rachkovsky was chief of Okhrana, the secret service in Imperial Russia. He was based in Paris from 1885 to 1902.