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Flora Europaea; Flora Europaea, Vol. 2, Rosaceae to Umbelliferae;Shaw, H. K. Airy; Tutin, T. G.; Heywood, V. H. · Kew Bulletin · 1971
Editors' prefaceV. H. Heywood; S. M. Walters · 1989
Nature and natural classificationV. H. Heywood · 1989
Infraspecific categories: Summary of discussionV. H. Heywood · 1970
Systematics–the stone of SisyphusV. H. HEYWOOD · 1974
A Flora of EuropeBURGES, N. A.; HEYWOOD, V. H. · 1957
The Information Problem in BiosystematicsHEYWOOD, V. H. · 1962
Preparation of Flora URSS ForewordHEYWOOD, V. H. · 1965