cultural historical activity theory

[Susan Gilbert]

Any responses on my earlier inquiry? Please forgive me if it is an inappropriate request.
Hi All,
Can anyone here tell me who coined the term Cultural-historical activity  
theory, (CHAT) and where it first appeared in print? My earliest extant writing on this is Karl Marx in his Theses On Feuerbach (1845) where he  
outlines his theory on object-oriented activity or labor. Am I barking
up the right tree, here?
Any help or leads would be greatly appreciated.

Susan Dean Gilbert
susandgilbert at msn.comGet more from the Web.  FREE MSN Explorer download : http://explorer.msn.com