Columbia subject headings:
Avicenna, 980-1037.
Hamadhānī, Abū Saʻd.
Logic--Early works to 1800.
Harvard subject headings:
Avicenna, 980-1037.
Logic--Early works to 1800
Princeton subject headings:
Avicenna, 980-1037.
Hamadhānī, Abū Saʻd.
Logic--Early works to 1800.