* for Clausewitz in archives containing works by numerous key Marxist writers.
(This Google engine returned 222 hits from the Marxists.org archive on 5 OCT 2006.)
* The Library of Congress On-Line Catalog (an excellent place to find old, obscure,
and non-English-language works by or about Clausewitz). A "Basic Search" by keyword appears to
be the best way to find interesting items.