Gratchev, I. (2020). Rock mechanics through project-based learning. CRC Press, Taylor & Francis Group.
Chicago-viite (17. p.)Gratchev, Ivan. Rock Mechanics Through Project-based Learning. Boca Raton, London: CRC Press, Taylor & Francis Group, 2020.
MLA-viite (9. p.)Gratchev, Ivan. Rock Mechanics Through Project-based Learning. CRC Press, Taylor & Francis Group, 2020.
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