International code of nomenclature of cultivated plants, 1969
Gilmour, J.S.L., ed.
International code of nomenclature of cultivated plants, 1969 - Utrecht International Bureau for Plant Taxonomy and Nomenclature of 1969 - 32 p. - Vol 64; Netherlands Internati .
International code of nomenclature of cultivated plants, 1969 - Utrecht International Bureau for Plant Taxonomy and Nomenclature of 1969 - 32 p. - Vol 64; Netherlands Internati .