source:Source: https://www.cambridge.org/core/services/aop-cambridge-core/content/view/6C6364EA190103B026D08EC2E305DFDA/S0008423900030584a.pdf/au-coeur-de-letat-lespionnageroger-faligot-et-remi-kauffer-paris-editions-autrement-collection-a-ciel-ouvert-1983-173-p.pdf
