Kaart van Nederland, IVON indeling Date of creation19XXCollectionThe art of knowledge: educational botanical wall charts 1870 - 1960
Kaart met IVON indeling Eryngium campestris Date of creation19XXCollectionThe art of knowledge: educational botanical wall charts 1870 - 1960
Aaltjesziekten van Kultuurgewassen. CreatorLith. Gebr. Braakensiek (drukker)CollectionThe art of knowledge: educational botanical wall charts 1870 - 1960