Over on Rumor Matrix, Winchull Chung I think it is, mentioned this thread.

Phil is right about the 'credits'. Here's what I have:

in the Periodical Bibliography as author of:
Animal Handling Skills, JTAS 19
Contact: The Githiaskio, JTAS 16
Contact: The Hlanssai, JTAS 22
Contact: The Jgd-ii-Jagd, JTAS 17
Data File: Notes on Information Sources in Traveller Campaigns, JTAS 24

and in the 2nd volume of periodical bibliography which I'm working on:
Aliens, White Dwarf 47 (rules for generating the Phulgk''k'k'k)
Worldly Power, WD 46 - one of my favourites for many years
Lone Dragon, WD 68
+ a review of The Traveller Book, WD 38

He also pointed out Mr Masters' credits in GURPS Alien Races IV and GURPS Star ports.

This highlights a limitation of my bibliography. If there's a 'main' author, they get the listing; if there's more than 3 authors I use 'et al' after the third. So a search didn't turn up Phil's name for either of those two books. And for all I know there may be others he's contributed to.

Is this kind of thing critical for people? It's a bit late for the edition Andy is no doubt busy on as I write, but I could consider revising my methodology for future revisions if it's important to identify any/every Traveller writer ever credited. Of course, I might also just go mad!