Gregorius Magister.
The marvels of Rome /
Master Gregorius ; translated with an introduction and commentary by John Osborne 
. - Toronto : Pontifical Institute of Mediaeval Studies,  1987 
. - viii, 114 p.  21 cm. 
 - (Mediaeval sources in translation  ; 31 )
<br/>К.: Бібліогр. : c. 101-111, Index 
<br/><label>  ISBN: </label>0-88844-281-5