Commission Decision 89/501/EEC of 18 July 1989 laying down the criteria for approval and supervision of breeders' associations and breeding organizations which establish or maintain herd-books for pure-bred breeding pigs (OJ L 247, 23.8.1989, p. 19).
Décision 89/506/CEE de la Commission du 18 juillet 1989 fixant le certificat des reproducteurs porcins hybrides, de leurs sperme, ovules et embryons (JO L 247 du 23.8.1989, p. 34).