Directive 71/393/EEC of 18 November 1971, Annex: Section 4 (method A) and Section 1, respectively. (OJ L 279, 20.12.1971, p. 7).
Directive 71/393/CEE de la Commission, annexe: paragraphe 4 - procédé A et paragraphe 1, respectivement JO L 279 du 20.12.1971, p. 7).