al-Khuwarizmi, Muhammad ibn Ahmad,  -997 or 998 <br/><br/>
Mafatih al-'ulum / 
 Mafatih al-olum 
ta'lif Abi'Abd Allah Muhammad ibn Ahmad ibn Yusuf al-Khuwarizmi 
 - Leiden :  E. J. Brill,  1968 
 - 328 p. ;  24cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Arabic language--Dictionaries