Charmas, M. (1991). Polar session - Arctic environment research, Lublin, Poland - April 1991. UMCS.
Cita Chicago Style (17a ed.)Charmas, Maria. Polar Session - Arctic Environment Research, Lublin, Poland - April 1991. Lublin: UMCS, 1991.
Cita MLA (9a ed.)Charmas, Maria. Polar Session - Arctic Environment Research, Lublin, Poland - April 1991. UMCS, 1991.
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