TY  - BOOK
AU  - Heytesbury,William
AU  - Spade,Paul Vincent
TI  - On "insoluble" sentences: chapter one of his "Rules for solving sophisms"
SN  - 0-88844-270-X
PY  - 1979///
CY  - Toronto
PB  - Pontifical Institute of Mediaeval Studies
N1  - Бібліогр. : c. 97-101, Index
ER  -