LLow cost milk productionLow cost milk productionde Gwyn JonesEdiciones (1)Low cost milk production (1997)Nuffield Farming Scholarships Trust · inglésMás obras de Gwyn JonesAAdvanced level statisticsAdvanced level statisticsEEmynwyr Dyffryn ConwyEmynwyr Dyffryn ConwyGG^wyl a gwaithG^wyl a gwaith