Gregersen, H. M Planning and managing forestry research : guidelines for managers / Hans M. Gregersen, Allen L. Lundgren and David N. Bengston. - Rome : FAO, c1990. - xi, 181 p. : ill. ISBN: 9251029636 LCCN: 91013169 Subjects--Topical Terms: Forest management--Vocational guidance.Forest conservation.Forests and forestry--Vocational guidance.Executives--Vocational guidance.