References 



Abele, G., D.A. Walker, J. Brown, M.C. Brewer and D.M. Atwood 

 (1978) Effects of low ground pressure vehicle traffic on tundra at 

 Lonely, Alaska. U.S. Army Cold Regions Research and Engineering 

 Laboratory Special Report 78-16, 63 pp. 



Abrahamsen, G. (1973) Studies on body volume, body-surface area, den- 

 sity and live weight of Enchytraeidae (Oligochaeta). Pedobio/ogia, 

 13: 6-15. 



Addison, J. A. (1977) Population dynamics and biology of Collembola 

 on Truelove Lowland. In Truelove Lowland, Devon Island, Can- 

 ada: A High Arctic Ecosystem (L.C. Bliss, Ed.). Edmonton: The 

 University of Alberta Press, pp. 363-382. 



Addison, J. A. and D. Parkinson (1978) Influence of Collembolan 

 feeding activities on soil metabolism at a high arctic site. Oikos, 30: 

 529-538. 



Agricultural Research Council (1965) The nutrient requirements of farm 

 livestock. In No. 2 Ruminants. Technical Reviews and Summaries. 

 Section 2 (Technical Committee on the Nutrient Requirements of 

 Farm Livestock, Agricultural Research Council, Ed.). London: Her 

 Majesty's Stationery Office, pp. 71-85. 



Ahmadjian, V. (1970) Adaptations of Antarctic terrestrial plants. In 

 Antarctic Ecology (M.W. Holdgate, Ed.). London: Academic 

 Press, pp. 801-811. 



Akiyama, M. (1970) Some soil algae from the arctic Alaska, Canada 

 and Greenland. Shimane University of Natural Science, Memoir of 

 the Faculty of Education, 4: 53-75. 



Alexander, M (1961) Introduction to Soil Microbiology. New York: 

 John Wiley, 472 pp. 



Alexander, M. (1971) Microbial Ecology. New York: John Wiley, 511 

 pp. 



Alexander, V. (1974) A synthesis of the IBP Tundra Biome circumpolar 

 study of nitrogen fixation. In Soil Organisms and Decomposition in 

 Tundra: Proceedings of the Microbiology, Decomposition and In- 

 vertebrate Working Groups Meeting, Fairbanks, Alaska, August 

 1973 (A.J. Holding, O.W. Heal, S.F. MacLean, Jr., and P.W. 

 Flanagan, Eds.). Stockholm: International Biological Programme 

 Tundra Biome Steering Committee, pp. 109-121. 



Alexander, V. (1975) Nitrogen fixation by blue-green algae in polar and 

 subpolar regions. In Nitrogen Fixation by Free-living Microorgan- 

 isms (W.D.P. Stewart, Ed.). Cambridge: Cambridge University 

 Press, pp. 175-188. 



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