TY  - JOUR
AU  - Ballard, David
TI  - Coloring a Dodecahedron with Four Colors(1)
JO  - Canadian mathematical bulletin
PY  - 1971
SP  - 103
EP  - 105
VL  - 14
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1971-018-1/
DO  - 10.4153/CMB-1971-018-1
ID  - 10_4153_CMB_1971_018_1
ER  -