Planning and managing forestry research : guidelines for managers /

بواسطة Gregersen, H. M.
منشور في 1990

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

بواسطة Gregersen, H. M.
منشور في 2007

Guidelines for economic appraisal of watershed management projects /

منشور في 1987

Valuing forests : context, issues and guidelines /

منشور في 1995