https://en.wikipedia.org/wiki/Georgi_Plekhanov
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-A.K. Voronsky, G. V. Plekhanov,
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-Daniela Steila, Genesis and Development of Plekhanov’s Theory of Knowledge. A Marxist Between Anthropological Materialism and Physiology,
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-A.K. Voronsky, G. V. Plekhanov,
"
-Daniela Steila, Genesis and Development of Plekhanov’s Theory of Knowledge. A Marxist Between Anthropological Materialism and Physiology,