TY  - BOOK
AU  - Gay,David
TI  - Explorations in topology: map coloring, surfaces, and knots 
SN  - 0123708583 (papel alcalino)
AV  - QA611 G39
U1  - 514 22
PY  - 2007///
CY  - Amsterdam
PB  - Elsevier Academic
KW  - Topología
ER  -