MULTIVARIATE STATISTICAL TECHNIQUES OF WATER QUALITY IN TIGRIS RIVER WITHIN BAGHDAD CITY. J. eng. sustain. dev. [Internet]. 2021 May 1 [cited 2024 May 3];25(3):81-96. Available from: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/60