Webb, L. J. (1977). Ecological considerations and safeguards in the modern use of tropical lowland rain forests as a source of pulpwood: Example, the Madang Area P.N.G. Office of Environment and Conservation, Department of Natural Resources, Papua New Guinea.
Παραπομπή σε μορφή Chicago (17η εκδ.)Webb, Leonard J. Ecological Considerations and Safeguards in the Modern Use of Tropical Lowland Rain Forests as a Source of Pulpwood: Example, the Madang Area P.N.G. [s.l.]: Office of Environment and Conservation, Department of Natural Resources, Papua New Guinea, 1977.
Παραπομπή σε μορφή MLA (8th εκδ.)Webb, Leonard J. Ecological Considerations and Safeguards in the Modern Use of Tropical Lowland Rain Forests as a Source of Pulpwood: Example, the Madang Area P.N.G. Office of Environment and Conservation, Department of Natural Resources, Papua New Guinea, 1977.