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Structure de la production porcine en 1981
(1985)
L'élevage porcin en Belgique : localisation, orientation, dimension des exploitations
Tambuyzer, C., (1982)
The changing Australian pig industry
Bennett, Catherine, (1982)
The Zimbabwe transport system
Shoniwa, C., (1983)
The Zimbabwean pig industry
Homewood, G., (1983)