TY  - BOOK
AU  - Dubnov,IAkov Semenovich
TI  - Mistakes in geometric proofs
AV  - PAM QA459.D813 
PY  - 1963///
CY  - Boston : 
PB  - Heath and Company
KW  - Geometry
KW  - Problems
KW  - exercises etc
KW  - Fallacies (Logic)
ER  -