Ashraf, Muhammad Zeeshan, Dr. Saira Husnain, and Dr. Nazia Parveen Gill. 2018. “CONCEPTS OF COSMOLOGY REGARDING ITS EVOLUTION”. THE SKY-International Journal of Physical Education and Sports Sciences (IJPESS) 2 (December):12-16. https://doi.org/10.51846/the-sky.v2i0.221.