Abbasi, Mubashir Ul-Haq, and Sreeramula Rajeswara Sarma. 2018. “An Astrolabe by Muhammad Muqim of Lahore Dated 1047 AH (1637–38 CE)”. Islamic Studies 53 (1-2). http://irigs.iiu.edu.pk:64447/ojs/index.php/islamicstudies/article/view/178.