. . . . . . "كشف القناع في رسم الأرباع" . . . "Kashf al-qināʻ fī rasm al-arbāʻ" . "\"A treatise on different kinds of quadrants in 2 qisms of 10 + 9 faṣls, mentioning those who invented them ... Ibn al-ʻAṭṭār's work merits publication and analysis.\" David A. King, A Survey of the Scientific Manuscripts in the Egyptian National Library (Winona Lake, 1986), p. 74." . "Early works" . . . . . . . . . . . . . . .