ministry of Water Resources and Irrigation. (2006). National Water Research Center. ministry of Water Resources and Irrigation.
Παραπομπή σε μορφή Chicago (17η εκδ.)ministry of Water Resources and Irrigation. National Water Research Center. Cairo: ministry of Water Resources and Irrigation, 2006.
Παραπομπή σε μορφή MLA (9th εκδ.)ministry of Water Resources and Irrigation. National Water Research Center. ministry of Water Resources and Irrigation, 2006.
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