http://id.wikipedia.org/wiki/Kali_Serayu
http://www.wisatamelayu.com/id/object/848/sungai-serayu/?nav=cat
http://id.wikipedia.org/wiki/Bendung_Gerak_Serayu_Gambarsari
Ujian Mid Semester Audit II - Dra. Atiek Sri Purwati, Msi, Ak Download
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