Parvesh Sharma, Dr. Kapil Kumar, and Prof. (Dr.) Himanshu A. Pandya. 2019. “DETERMINATION OF BALLPOINT AND GEL PEN INKS USING UV VIS SPECTROSCOPY”. Journal of Population Therapeutics and Clinical Pharmacology 26 (3): 77-106. https://doi.org/10.53555/6q8wak31.