International Botanical Congress, International Bureau for Plant Taxonomy and Nomenclature, & International Botanical Congress. (1964). Preliminary report on the stabilization of names of plants of economic importance: Presented to the tenth International Botanical Congress. [International Bureau for Plant Taxonomy and Nomenclature].

International Botanical Congress, International Bureau for Plant Taxonomy and Nomenclature, and International Botanical Congress. Preliminary Report on the Stabilization of Names of Plants of Economic Importance: Presented to the Tenth International Botanical Congress. Utrecht: [International Bureau for Plant Taxonomy and Nomenclature], 1964.

International Botanical Congress, et al. Preliminary Report on the Stabilization of Names of Plants of Economic Importance: Presented to the Tenth International Botanical Congress. [International Bureau for Plant Taxonomy and Nomenclature], 1964.