awgldk
/
wikidata
/
Login
Register
TriplyDB
Wikidata
Browser
Triples
Insights
Schema
BETA
Class frequency
Class hierarchy
SPARQL
GraphQL
Graphs
1
Q75126175
Q75126175
http://www.wikidata.org/entity/Q75126175
Q75126175
about
Q75126175
http://www.wikidata.org/entity/Q75126175
sameAs
The Solution of the Four-Color-Map Problem / Kenneth Appel and Wolfgang Haken. - (1977)