Last seen in:
- The Washington Post Sunday - Mar 20 2022
- L.A. Times Daily - Oct 12 2021
- The Washington Post - Oct 12 2021
- Newsday.com - Jul 25 2021
- Universal - Aug 5 2018
- Newsday.com - Dec 4 2016
- L.A. Times Daily - Jun 16 2015
- Premier Sunday - King Feature Syndicate - Nov 23 2014
- Universal - Oct 27 2014
- Newsday.com - Apr 18 2014
Related Clues:
- Chemical compound in fertilizers and plastics
- Soapmaking ingredient
- Nitrogen-hydrogen compound
- Fertilizer material
- Cleaner additive
- Household cleaning chemical
- Fertilizer variety
- Fertilizer type
- Common fertilizer compound
- Saltpeter component
- Compound in gunpowder
- Fertilizer
- Cleaning chemical
- Compound in some explosives
- Potassium ___ (saltpeter)