TY  - BOOK
AU  - Lindberg David C
TI  - Roger Bacon's philosophy of nature :  critical edition , with english translation , introduction and notes of De multiplicatione specierum and De speculis comburentibus
U1  - R3xG20, M3 
PY  - 1983///
CY  - Oxford
PB  - Clarendon Press      
ER  -