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Start Over You searched for: Holding Institution Princeton University ✖ Remove constraint Holding Institution: Princeton University Title Risālah fī al-ʻamal bi-asʹhal ālah min qibal al-nujūm ✖ Remove constraint Title: Risālah fī al-ʻamal bi-asʹhal ālah min qibal al-nujūm Keywords Astronomical instruments ✖ Remove constraint Keywords: Astronomical instruments