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Books about Ratnikov:
RATNIKOV ODMOR by KRISTIJANA ROSFOR (1960)
Wiki information Ratnikov:
Daniil Ratnikov is an Estonian professional footballer, who plays for Sillamäe Kalev, mainly as an attacking midfielder.
Sergei Ratnikov is an Estonian professional football manager and former player. Ratnikov is the current manager of Estonian Meistriliiga team JK Sillamäe Kalev.