This page is still a work in progress.
http://www.tckworld.com/
http://www.tckworld.com/useem/cottrell.html
http://www.tckid.com/crossculturalkid.html
http://www.tckid.com/group/top-tck-research-and-experts/
http://www.gng.org/
http://www.worldweave.com/GN.html