TY  - BOOK
AU  - Dales, Richard C. 
TI  - The Scientific achievement of the middle ages
SN  - 0812210573
U1  - 909.07 D15 
PY  - 1973///
CY  -  USA
PB  -  University of Pennsylvania Press
N1  - CAS; Bachelor of Secondary Education major in Social Studies
ER  -