search query: @supervisor Levón, Martti / total: 18
references: 15-18 / 18
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title | year | author | ||
15. | 1932 | Carlberg, R. V. |
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16. | 1932 | Mustakallio, Pauli |
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17. | 1931 | Sergejeff, Paul |
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18. | 1928 | Pölönen, Arvo |
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