For an overview of BRL-CAD, see:

P. H. Deitz, W. H. Mermagen, Jr., and P. R. Stay, ``An Integrated Environment for Army Navy and Air Force Target Description Support'', in The Proceedings of the Tenth Annual Symposium on Survivability and Vulnerability of the American Defense Preparedness Association, held at the Naval Ocean Systems Center, San Diego, CA, May 10-12, 1988.

Also in ``The Ballistic Research Laboratory CAD Package Release 4.0 Manuals, Volume I, BRL-CAD Philosophy'' Page V1S04A00