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3Pollen contamination in seed orchards. Proceedings Pollen contamination in seed orchards. Proceedingsby Lindgren, D. (ed.), Sveriges Lantbruksuniversitet, Umeaa (Sweden). Inst. foer Skoglig Genetik och Vaextfysiologi swe, Nordic Group for Tree Breeding eng 20-22 Aug 1991 Meeting Umeaa (Sweden)
Published 1991Texto bibliotecaFAO IT