[1]
S. Akhtar, A. Sohail, U. Tariq, F. A. Khan, and S. Asghar, “Willingness to pay for improved drinking water facility in Samsani Khui, Johar Town, Lahore, Pakistan”, Arch. Agric. Environ. Sci., vol. 2, no. 3, pp. 187–193, Sep. 2017.