1. Benoit, J.M., Fitzgerald, W.F. and Damman, A.W.H. (1994) Historical atmospheric mercury deposition in the mid-continental U.S. as recorded in an ombrotropic peat bog, in C.J. Watras and J.W. Huckabee (eds.), Mercury Pollution: Integration and Synthesis, Lewis Publishers, Ann Arbor, Michigan, pp. 187–202.
2. Bottenheim, J.W. and Shepherd, M.F. (1995) C2-C6 hydrocarbon measurements at four rural locations across Canada, Atmos. Environ. 29, 641–664.
3. Brosset, C. (1982) Total airborne mercury and its possible origin, Water Air Soil Pollut 17, 37–50.
4. Brosset, C. (1987) The behaviour of mercury in the physical environment. Water Air Soil Pollut. 34, 145–166.
5. Bundesanstalt für Geowissenschaften und Rohstoffe (1989) Reserven, Ressourcen und Verfügbarkeit von Energierohstoffen, Hannover.