Khan, Shazia A, Zain Ul Amin, Fouzia Fouzia, and Samina Jadoon. 2010. “A COMPARATIVE TRIAL OF COPPER T 380 AND Cu 375 IUCD”. Journal of Ayub Medical College Abbottabad 22 (3):185-87. https://jamc.ayubmed.edu.pk/index.php/jamc/article/view/2916.