IUFRO World Congress Oslo, Norway, International Union of Forestry Research Organizations, & Norsk institutt for skogforskning. (1976). XVI IUFRO World Congress: Proceedings. Norwegian IUFRO Congress Committee, c/o Norwegian Forest Research Institute.

IUFRO World Congress Oslo, Norway, International Union of Forestry Research Organizations, and Norsk institutt for skogforskning. XVI IUFRO World Congress: Proceedings. As-NLH, Norway: Norwegian IUFRO Congress Committee, c/o Norwegian Forest Research Institute, 1976.

IUFRO World Congress Oslo, Norway, et al. XVI IUFRO World Congress: Proceedings. Norwegian IUFRO Congress Committee, c/o Norwegian Forest Research Institute, 1976.