@book{ BA13288550,
author = "Benson, Robert Louis and Lanham, Carol Dana and Haskins, Charles Homer and University of California, Los Angeles. Graduate School of Management and Harvard University. Committee on Medieval Studies and Constable, Giles",
title = "Renaissance and renewal in the twelfth century",
publisher = "University of Toronto press",
year = "1991",
series = "Medieval Academy reprints for teaching",
number = "26",
URL = "https://ci.nii.ac.jp/ncid/BA13288550"
}