Antirrhinum CreatorVoorn, A.A. vanDate of creation19XXCollectionThe art of knowledge: educational botanical wall charts 1870 - 1960
Polytrichum CreatorVoorn, A.A. vanDate of creation19XXCollectionThe art of knowledge: educational botanical wall charts 1870 - 1960
Dubbele bevruchting Angiospermae CreatorVoorn, A.A. van (zie index)Date of creation19XXCollectionThe art of knowledge: educational botanical wall charts 1870 - 1960
Bloemdiagrammen CreatorVoorn, A.A. van (volgens Index)Date of creation19XXCollectionThe art of knowledge: educational botanical wall charts 1870 - 1960