Refine Your Search
Book List
2
-
Problem solving research : a strategy for change / by Niels Röling.
- Landbouwhogeschool. Afdeling voorlichtingskunde,
- 1973.
- Wageningen :
-
Which farmers have contact with extension workers? : the case of cocoa farmers in Western Nigeria / by Bart van den Borne and Niels Röling.
- 862.9
- Landbouwhogeschool. Afdeling voorlichtingskunde,
- 1971.
- Wageningen :