@book{55699,
	author = {عبد الله حنفي},
	title = {العقود الإدارية},
	publisher = {دار النهضة العربية ،},
	year = {1999 .},
	address = {القاهرة :},
	url = {https://fll.law.cu.edu.eg/fulltext/bks/B07-02719.pdf}
}