Links to other resources
- sw.opencyc.org /2012/05/10/concept/en/Set_of_line_segments
- sw.opencyc.org /2012/05/10/concept/en/LineSegmentSet
- sw.opencyc.org /2012/05/10/concept/en/Set_of_line_segments_408
- sw.opencyc.org /2012/05/10/concept/en/StraightLineSegmentSet