The book I have was published in 2001, well put together at Kinkos I should say. The US on-line alumni directory has come up since then and is interesting more for what it omits rather than what it often says. For example, the Harrar association makes a concerted effort in its meetings/presentations to dodge the Derg era and who did what to whom. BUT, I am always left wondering at an entire class as being listed as merely " deceased" and most seemingly dying of undisclosed causes in the 1970s .
I would LOVE to get interviews with some of these guys, but they are VERY reserved. It reminds me a lot of my Dad's encounters with Wehrmacht veterans in the early 1960s.
there is another Ethiopian Patriots group in The DC area and they seem to be more forthcoming with information, especially about the Eritrean, Somali and Italian wars.
good Luck!
The Ethiopian Crown Council may also know.