Alfred K. Henn books & textbook
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
Equivalent and equidecomposable figures (Topics in mathematics)
V. G Boltianskii Alfred K. Henn Chales E. Watts
D. C. Heath and Company /1963T Paperback / 68 Pages
