Newest Bairds can and will omit many things to conserve size of The Tome!
Look at any World Atlas from 1940s to 2000s. History is lost.
Go to Your Library and look up Bairds. Get more than several printing Editions.
Compare and plan to spend time!
There are many IFC and PHC GLOs who concentarted on ceratin profiles of Schools. ASA and Tri Sigma I beleive being two.
TKN which Merged With LXA in 1939 were one of the IFC along with Phi Sigma Epsilon, Merged with Phi Sigma Kappa, and Sigma Tau Gamma, HQ in Warrensburg Mo.
I beleive there is an NPC with HQ in Columbia, Mo. Cannot Remember which one? Was NE of Campus.