IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-12-4-48059 Original Research Paper Comparison Of Antegrade Percutaneous Versus Retrograde Ureteroscopic Lithotripsy For Management Of Upper Ureteric Calculus. Vijayanand Potdar Dr. Amrita Vikram Patkar Dr. April 2023 12 4 01 02