search materials(including e-books and e-journals) held by Hokkaido university.
search materials held by universities in Japan.
search information on academic articles published in Japan.
search NDL(National Diet Library) online, NDL Digitized Contents and "Aozora Bunko", materials of a Japanese digital library.
Search keyword：(Author: #Du Boulay F. R. H.)
Germany in the later Middle Ages / by F.R.H. Du Boulay
: pbk. - London : Athlone Press , 1983