Citation: M. Befu et al., Classification of 'Tosa-Buntan' pummelo (Citrus grandis [L.] Osb.), 'Washington' navel orange (C-sinensis [L.] Osb.) and trifoliate orange (Poncirus trifoliata [L.] Raf.) chromosomes using young leaves, J JPN S HOR, 69(1), 2000, pp. 22-28