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STAFLEU, F.A., V.DEMOULIN, W.GREUTER (eds.) a.oth.: International Code of Botanical Nomenclature. Adopted by the Twelfth International Botani- cal Congress, Leningrad, July 1975. 1978. (Regnum Vegetabile, vol. 97). XIV,457 p. gr8vo. Cloth. (35015) 59.00
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