Soewarno, S., & Yuningsih, S. (2004). Hydrological Characteristics of Kaligarang Watershed. Universitas Muhammadiyah Surakarta.
Chicago-viite (17. p.)Soewarno, Soewarno, ja Srimulat Yuningsih. Hydrological Characteristics of Kaligarang Watershed. Universitas Muhammadiyah Surakarta, 2004.
MLA-viite (9. p.)Soewarno, Soewarno, ja Srimulat Yuningsih. Hydrological Characteristics of Kaligarang Watershed. Universitas Muhammadiyah Surakarta, 2004.
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