U. Schweinfurth
On the Vegetation of Western Australia. J. S. Beard's Vegetation Survey of Western Australia
Documents de cartographie écologique 24 (1981), p. 24-28
U. Schweinfurth
Three new sets of maps for Papua New Guinea : geomorphology, vegetation, land limitation and agricultural land use potential
Documents de cartographie écologique 24 (1981), p. 29-34