- FondsYapp - Papers and photographs of R. H. (Harry) Yapp
- Series5 - Offprints
- Item1 - New and interesting plants
- Item2 - Two Malayan 'Myrmecophilous' ferns
- Item3 - Fruit dispersal in Adenostemma viscosum
- Item4 - Sketches of vegetation
- Item5 - Stratification in the vegetation of a marsh
- Item6 - Spiraea ulmaria L.
- Item7 - Salt marshes of the Dovey estuary
- Item8 - Dovey salt marshes in 1921
- Item9 - Concept of habitat
- 2 more...