| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Inside the Iron Works: How Grumman's Glory Days Faded | 978-1-5575O-329-9 (1-5575O-329-X) | 2004 | George M. Skurla |
H.G. · H. Gregory · W G · W. Gregory · W H · William G. · William Gregory · William H. · William Henry Gregory