TY  - BOOK
AU  - Lewry, Osmund, O.P.
TI  - The Liber sex principiorum, a supposedly porretanean work a study in ascription
PY  - 1981///]
CY  - [б. м.] 
PB  - Bibliopolis
N1  - Estratto da : Gilbert de Poitiers et ses contemporains aux origines de la "Logica modernorum"
ER  -