TY  - BOOK
AU  - Ullmann, Walter
TI  - A history of political thought: the middle ages
T2  - A pelican original
U1  - BIB/20.04.02/05153 
PY  - 1970///
CY  - Harmondsworth
PB  - Penguin Books, 
KW  - HISTORIA DE LAS IDEAS
KW  - POLITICA
KW  - SIGLOS V-XII
KW  - EUROPA
ER  -