The International Encyclopedia of Systems and Cybernetics

is highly recommended.

Please see announcements for the 2 volumes 2nd edition

a good description of the original design of the ENCYCLOPEDIA can be found here.

Pls. see also the BBK lecture in the SAUR Library by Charles Francois and Heiner Benking at the Saur Library at Humboldt University,

some powerpoints

and the pondering and invitations about a possible Futures for Encyclopedias & Atlases and Erthics and Pragmatics.

And some entries relating to Heiner Benking's work in the Encyclopedia. 
This entries will be hopefully improved later in a new MEDIA-WIKI which invites Systems Experts for a new collaborative 3rd Edition.