23 A. Hamza, Guidelines on Environmentally Friendly Industrial Estates in the Arab Region, technical publication (Cairo, League of Arab States, secretariat of the Arab Ministers Responsible for Environmental Affairs, November 2005) (in Arabic).
23 A.哈姆扎，《阿拉伯区域有利环境工业区指导方针》，技术性出版物（开罗，阿拉伯国家联盟，阿拉伯负责环境事务部长秘书处，2005年11月）（阿拉伯文）。