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Start Over You searched for: Title Risālah al-fatḥīyah fī al-aʻmāl al-jaybīyah ... [etc ✖ Remove constraint Title: Risālah al-fatḥīyah fī al-aʻmāl al-jaybīyah ... [etc Century 18th century ✖ Remove constraint Century: 18th century Keywords Astronomical instruments ✖ Remove constraint Keywords: Astronomical instruments