- FondsYapp - Papers and photographs of R. H. (Harry) Yapp
- Series3 - Photographic collections
- Subseries1 - Glass plate negatives
- FileG - General (unclassified)
- 16 more...
- ItemG17 - [Diagram of plant leaves]
- ItemG18 - [Diagram of water plants]
- ItemG19 - [Diagram of plants]
- ItemG20 - ["Die wichtigsten Humus- und Torf Arten.."]
- ItemG21 - [River valleys of East Norfolk]
- ItemG22 - [Der Bodensee]
- ItemG23 - [Plate III. A cypress swamp]
- ItemG24 - [unknown]
- ItemG25 - [unknown]
- 80 more...