Dr. Zahid Khan, Asadullah and Arshad Ali 2022. Anemia and its Causes among Children in District Dir Lower Applying Ranked Set Sampling Method for Data Collection. Research Journal of Social Sciences and Economics Review. 3, 4 (Nov. 2022), 34-37. DOI:https://doi.org/10.36902/rjsser-vol3-iss4-2022(34-37).