Convex figures
[by] I.M. Yaglom and V.G. Boltyanskiĭ. Translated by Paul J. Kelly and Lewis F. Walton.
- New York : Holt, Rinehart and Winston, c1961
- 301 p. : ill. ; 25 cm.
- Library of the mathematical circle, v. 4 .
- Biblioteka matematicheskogo kruzhka. English .