International Code of Botanical Nomenclature. Adopted by the Fourteenth International Botanical Congress, Berlin, July-August 1987.
Konigstein: Koeltz, 1988. Octavo, More
Konigstein: Koeltz, 1988. Octavo, More
Oxford: Clarendon Press, (1973. third edition), Octavo, text illustrations, very good copy in dustwrapper. More
Cambridge: Cambridge University Press, (1953. second edition). Ocatvo, text illustrations, signature, stamp, a very good copy in chipped dustwrapper. More
Edinburgh: Edinburgh University Press, 1989. Octavo, black and white photographs, text illustrations, as new in dustwrapper. More