Northrop Grumman
Viited
- ↑ "The SIPRI Top 100 Arms-producing and Military Services Companies, 2017". Stockholm International Peace Research Institute. Vaadatud 27. detsember 2022.
- ↑ "Northrop Grumman". Fortune Magazine. Vaadatud 27. detsember 2022.
- ↑ "Northrop Wins Battle to Purchase Grumman : Industry: L.A.-based firm outbids Martin Marietta with $2.17-billion offer. Deal will not stem loss of jobs". Los Angeles Times. Vaadatud 27. detsember 2022.
- ↑ "What is Webb?". Northrop Grumman. Vaadatud 27. detsember 2022.