Cytotaxonomic studies in the genus Symphytum IV : Cytogeographic investigations in Symphytum officinale L. / Th.W.J. Gadella and E. Kliphuis

Cytotaxonomic studies in the genus Symphytum IV : Cytogeographic investigations in Symphytum officinale L. / Th.W.J. Gadella and E. Kliphuis