Eine Frage zu Irshad Al-'Ujm Li A'mal Al-Judhur Al-Sum: Guide to Operations on Irrational Radicals for Neophytes, by Muhammad b. Abi al-Fath Muhammad b. al-Sharqi Abi al-Ruh 'ISA b. Ahmad al-Sufi al-Shafi'i al-Misri an den Kundensupport stellen