Eleventh International Botanical Congres Seattle. (1972). Report on Botanical nomenclature seattle 1969. International Bureau for Plant Taxonomy.
Lua i Stíl Chicago (17ú heag.)Eleventh International Botanical Congres Seattle. Report on Botanical Nomenclature Seattle 1969. Netherlands: International Bureau for Plant Taxonomy, 1972.
Lua MLA (9ú heag.)Eleventh International Botanical Congres Seattle. Report on Botanical Nomenclature Seattle 1969. International Bureau for Plant Taxonomy, 1972.
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