TY  - BOOK
AU  - Walton Steven A. Ed.
TI  - Fifty years of medieval techonolgy and social change
T2  - A vista studies in the history of medieval technology science and art Volume 13
U1  - V5'J, R0 
PY  - 2020///
CY  - London
PB  - Routledge          
KW  - History
ER  -