TY  - BOOK
AU  - Tierney, Brian.
TI  - Sources of medieval history
T2  - His The Middle Ages ; v. 1
SN  - 0394321510 
U1  - 909 
PY  - 1978///
CY  - New York
PB  - Knopf, 
KW  - Middle Ages
N1  - Includes bibliographical references
ER  -