Second meeting on soil correlation for North America - Winnipeg - Vancouver, Canada, 25 Jul - 5 Aug 1966

argentina argentine canada cartografia cartographie cartography classification classification des sols eua gestion du sol manejo del suelo mexico mexique normalisation north america perfil del suelo profil du sol soil soil classification soil management soil morphological features soil profiles soil types sol standardizing suelo tipos de suelos trait morphologique du sol type de sol usa