s.l.: Harvard University Press, 1965 ; 1965

New York, NY: Fordham University Press, [2022]

Oregon State University, 2011

University of Chicago Press, 1997

Medieval Academy of America, 1997

University of Chicago Press, 1988

The Medieval Academy of America, 1988

The Johns Hopkins Press, 1971

JSTOR, 1971

JSTOR, 1963

The Johns Hopkins Press, 1963

University of Oregon, 1961

University of Oregon, 1954

JSTOR, 1954

JSTOR, 1961

JSTOR, 1978

JSTOR, 1969

JSTOR, 1994

University of Illinois Press, 1992

University of Illinois Press, 1981