BHARATHI, A. R. “A STUDY TO ASSESS THE RESPIRATORY STATUS OF PATIENTS WHO HAVE UNDERGONE CARDIO THORACIC AND VASCULAR SURGERY DURING PRETEST”. UTTAR PRADESH JOURNAL OF ZOOLOGY 42, no. 24 (December 14, 2021): 289-292. Accessed October 5, 2022. https://mbimph.com/index.php/UPJOZ/article/view/2694.