drainage, deep drainage, land, polders, sand-cement pit projects, drainage series, biesbosch, above hennip Date: June 1968 Keywords: deep drainage, drainage, polders, grounds, drainage drain series, sandcement pit projects Personal name: biesbosch, boven hennip

---

Size: 2636px × 2654px
Photo credit: © BNA Photographic / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: