1. Brown, D.J.A.: 1982, Water Air Soil Pollut. 18, 343
2. Eilers, J.M., Lien, G.J., and Berg, R.G.: 1984, Aquatic organisms in acidic environments: A litterature review. Dept. Nat. Res., Wisconsin, Tech. Bull. No 150
3. FAO-UNESCO 1974. Soil Map of the World, Vols. I, V, FAO-UNESCO, Paris
4. Fedra, K.: 1983, Environmental modeling under uncertainty: Monte Carlo simulation. IIASA Research Report, RR-83–28
5. Fjeld, B.: 1975, F,orbruk av fossilt brensel i Europa og utslipp av SO
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i perioden 1900–1972. NILU Teknisk Notat Nr 1/76