Here, you’ll find links to various reference PDF’s I’ve come across (the Federation Spaceflight Chronology series and so forth)

Federation Spaceflight Chronology

Vol. 1

Vol. 2

Vol. 3

Vol. 4

Vol. 5

Vol. 6

Vol. 7

Vol. 8

Vol. 9

Vol. 10

Vol. 11

Vol. 12

Vol. A – Klingon

Vol. B1 – Romulan

*(Note: So far, I’ve been unable to score a copy of the second half of this Romulan supplement-“B2”.  If anyone has a copy or knows where one’s at, drop me a comment)

Compilation Edition

Early Compilation

Guide to the Klingon Fleet