CHRISTOFFEL PIERRE VAN DER WESTHUIZEN
This document which goes as far as page 70, is a document drafted by a group of people who in some or other way were involved in Plan Katzen.  I don't think the entire document will be known to all the people involved.  They did not all play a continuous role in this process.  But I read it through and in my opinion it gives a very good overview, external idea of Plan Katzen, but it wasn't written by me.