Planning and managing forestry research : guidelines for managers /

door Gregersen, H. M.
Gepubliceerd in 1990

Integrated watershed management : connecting people to their land and water /

door Gregersen, H. M.
Gepubliceerd in 2007

Guidelines for economic appraisal of watershed management projects /

Gepubliceerd in 1987

Valuing forests : context, issues and guidelines /

Gepubliceerd in 1995