Schultz, A. M. (1969). A study of an ecosystem: 
the arctic tundra. Pages 77-93 in The eco- 
system concept in natural resource manage- 
ment (G.Van Dyne, ed.). Academic Press, NY. 
Shelford, V. E. (1943). The abundance of the 
collared lemming (Dicrostonyx groen- 
landicus) in the Churchill area, 1929 to 
1940. Ecology, 24:472-484. 
Speller, S.W. (1972). Biology of Dicrostonyx 
groenlandicus on Truelove Lowland, Devon 
Island, N.W.T. Pages 257-271 jn Devon 
Island |.B.P. project, high Arctic ecosystem 
(L. Bliss, ed.). University of Alberta. 
143 
Underwood, L. S. (This volume). Notes on the 
Arctic Fox (Alopex lagopus) in the Prudhoe 
Bay area of Alaska. 
Webber, P. J. and D. A. Walker (This volume). 
Vegetation and landscape analysis at Prud- 
hoe Bay, Alaska: A vegetation map of the 
Tundra Biome study area. 
White, R.G., B.R. Thompson, T. Skogland, 
S. J. Person, D. E. Russell, D. F. Holleman, 
and J. R. Luick (This volume). Ecology of 
caribou at Prudhoe Bay, Alaska. 
