Gorgees, Shatha Hazim. “Effect of Swimming Free 50 Meters for Males on Calcium Levels and Some Enzymes of Thyroid and Parathyroid Gland”. Indonesian Journal of Physical Education and Sport Science 4, no. 2 (May 10, 2024): 115-126. Accessed November 22, 2024. https://journal.unucirebon.ac.id/index.php/ijpess/article/view/700.