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Author: WikiMatrix
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English[en]
Petrov's wife, Natalya Yefimovna, was a well-known musicologist; his only daughter, Olga, co-wrote a number of his later works.
Spanish[es]
Su esposa, Natalia Yefimovna, era una conocida musicóloga, y su única hija, Olga, coescribió con él sus últimas obras.