TY  - BOOK
AU  - Valens, Evans G.
TI  - The Number of Things: :  Pythagoras, Geometry, and Humming Strings
AV  - QA460.P8V27 
CY  - New York
KW  -  Analytic--Plane
KW  -  Geometry
KW  -  Plane
KW  - Mathematics
KW  - Pythagorean theorem
ER  -