G. Poulsen

Using farm trees for fuelwood.

G. Poulsen, 1983 .

Trees for people. An account of the forestry research program supported by the International Development Research Centre.

G. Lessard, G. Poulsen, C. Sanger, 1977 .

Man and tree in tropical Africa: three essays on the role of trees in the African environment.

G. Poulsen, 1978 .