International Code of Botanical Nomenclature : Code international de la nomenclature botanique : Internationaler Code der botanischen Nomenklatur : adopted by the 13th International Botanical Congress, Sydney,August 1981 / International Botanical Congres.
International Code of Botanical Nomenclature : Code international de la nomenclature botanique : Internationaler Code der botanischen Nomenklatur : adopted by the 13th International Botanical Congress, Sydney,August 1981 / International Botanical Congres.
Regnum vegetabile, a series of publications for the use of plant taxonomists published under the auspices of the International Association for Plant Taconomy, edited by Frans A. Stafleu; Dr. W. Junk, Publishers, The Hague/Boston;.