by R. Fritsch

Bohn, Scheltema & Holkema , W. Junk , Distributors for the United States and Canada, Kluwer Boston 1982 Regnum vegetabile v. 108

Available at 9 libraries

edited by R.J. Moore

A. Oosthoek's Uitgeversmaatschappij N.V. , International Bureau for Plant Taxonomy and Nomenclature 1972 Regnum vegetabile v. 84

Available at 3 libraries

edited by R.J. Moore

International Bureau for Plant Taxonomy and Nomenclature of the International Association for Plant Taxonomy 1970 Regnum vegetabile v. 68

Available at 3 libraries

edited by J.S.L. Gilmour, chairman

International Bureau for plant taxonomy and nomenclature of the International Association for plant taxonomy 1969 Regnum vegetabile v. 55

Available at 1 libraries

edited by R. Ornduff

International Bureau for Plant Taxonomy and Nomenclature of the International Association for Plant Taxonomy 1968 Regnum vegetabile v. 55

Available at 3 libraries

edited by R. Ornduff

International Bureau for Plant Taxonomy and Nomenclature of the International Association for Plant Taxonomy 1967 Regnum vegetabile v. 50

Available at 2 libraries