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Hashim Farooq; Yasir Jamil; Muhammad Raza Ahmad; Muhammad Afzal Ahmad Khan; Tahir Mahmood; Zeeshan Mahmood; Zia-ul-Haq; Shakeel Ahmad Khan. Lead Pollution Measurement Along National Highway and Motorway in Punjab, Pakistan. J. Basic Appl. Sci. 2012, 8, 463-467.