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Chuanpis Aroonrungsikull; Kasem Piluek; Pornpan Phuprompunl; Siriwan Burikamt; Siriporn Chumsangchotsakult. Production and Verification of Interspecific Hybrids in Brassica spp. Agr. Nat. Resour. 1993, 27, 27-36.