Ya. S. Dubnov books & textbook
Proof in Geometry: With "Mistakes in Geometric Proofs" (Dover Books on Mathematics)
Dover Publications /2006-11-17 Paperback / 144 Pages
isbn-10: 0486453545 / isbn-13: 9780486453545
Mistakes in Geometric Proofs (Topics in mathematics)
Ya. S. Dubnov Alfred K. Henn Olga A. Titelbaum
D. C. Heath and Company /1963T Paperback / 57 Pages
