TY  - JOUR
AU  - Daniel Pedoe
TI  - The Missing Seventh Circle.
JO  - Elemente der Mathematik
PY  - 1970
SP  - 14
EP  - 15
VL  - 25
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ELMA_1970__25_140957/
ID  - ELMA_1970__25_140957
ER  -