May I ask U: can U scan German version of this document for me (if it is not difficult for U)?
I have read this document (russian version from TsAMO) and I agree with you that it is small enough informative. Unfortunately I could not find a sufficient number of documents describing the engineering and fortification equipment Fortress Berlin. The most informative document on this issue are reports of the Conference of 1 st Belorussian Front on the results of the Berlin operation. However, it is too one-sided view on this issue, I would like to read anything else regarding this issue.
Diaries of Reimann and Refior also can not be fully considered objective sources, because Information contained in these written by men interested in, hence is not objective.