# IOP 1952 Episode 90

> Still the Richest Hill! Miles of Birch! Betty's in Business! New Assignment for the Electron!

**Wikidata**: [Q127689512](https://www.wikidata.org/wiki/Q127689512)  
**Source**: https://4ort.xyz/entity/iop-1952-episode-90


## References

1. [Industry on Parade Film Collection](https://sova.si.edu/record/nmah.ac.0507)
2. [Source](https://sova.si.edu/record/nmah.ac.0507/ref180)