# Gleason Grading System
**Wikidata**: [Q1530169](https://www.wikidata.org/wiki/Q1530169)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Gleason_grading_system)  
**Source**: https://4ort.xyz/entity/gleason-grading-system


## References

1. Freebase Data Dumps. 2013