Research on civilian-based defence : proposals for research projects by the Netherlands "Steering Committee Social Defence" 1993 / by Giliam de Valk ; in coöperation with Johan NiezingDe BVD en inlichtingenrapportages : geïllustreerd met een case-study over het vierde kwartaalverslag van 1981 van de Binnenlandse Veiligheidsdienst over antidemocratische ontwikkelingen binnen de antikernenergiebeweging / Giliam de ValkDutch intelligence - towards a qualitative framework for analysis : with case studies on the Shipping Research Bureau and the National Security Service (BVD) / Guillaume Gustav de ValkDutch intelligence - towards a qualitative framework for analysis : with case studies on the Shipping Research Bureau and the National Security Service (BVD) / Guillaume Gustav de ValkHeadquarters anonymous / Giliam de Valk, Roy Lindelauf & Nico Timmermans