Guma
![](http://upload.wikimedia.org/wikipedia/commons/thumb/2/27/Rubber_scarce_WW2.jpg/250px-Rubber_scarce_WW2.jpg)
Guma ili elastična guma je mehanički čvrst i izvanredno elastičan materijal koji se dobija od kaučuka postupkom vulkanizacije.
Eksterni linkovi
![](http://upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/15px-Commons-logo.svg.png)
Guma na Wikimedijinoj ostavi
- International Rubber Research & Development Board Arhivirano 2006-01-16 na Wayback Machine-u
- History of the International Rubber Industry from 1870-1930 from EH.NET Arhivirano 2007-09-27 na Wayback Machine-u
- Rubber Board Of India Arhivirano 2007-09-27 na Wayback Machine-u
- Rubber Division of ACS Arhivirano 2019-05-01 na Wayback Machine-u
- Rubber timeline
- Stop Firestone's Use of Child Labor in Rubber Production