TY  - GEN
AU  - Ball, W. W. Rouse            
AU  - Coxeter,H.S.M.
TI  - Mathematical recreations & essays,
U1  - 510.76 
PY  - 1939///
CY  - New York
PB  - The Macmillan company
KW  - Mathematical recreations
KW  - Geometry
KW  - Famous problems
KW  - Cryptography
KW  - Ciphers
N1  - "Copyright. First edition, 1892 ... Eleventh edition, 1939."; Donations; Donations - Dr. Mostafa Gouda; "References for further study": p. 410. Bibliographical foot-notes; Arithmetical recreations.--Geometrical recreations.--Polyhedra.--Chess board recreations.--Magic squares.--Map-coloring Problems.--Unicursal problems.--Kirkman's school-girls problems.--Miscellaneous problems.--Three classical geometrical problems.--Calculating prodigies.--Cryptography and cryptanalysis
ER  -