Unkrauttafeln - Weed plates - Planches des mauvaises herbes - Ugressplansjer CreatorKorsmo, E. (wetenschapper)CollectionThe art of knowledge: educational botanical wall charts 1870 - 1960
Wandtafeln der Gräserkunde CreatorFreckmann (wetenschapper)CollectionThe art of knowledge: educational botanical wall charts 1870 - 1960