Arctic, Antarctic, and Alpine Research

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Vol. 22, No. 3, 1990

Editorial  
Mark F. Meier
213
Climate, Tree-Ring, and Glacial Fluctuations in the Rio Frias Valley, Rio Negro, Argentina  
Ricardo Villalba, Juan C. Leiva, Sigfrido Rubulls, Jorge Suarez, Luis Lenzano
215
Growth Trends of Whitebark Pine and Lodgepole Pine in a Subalpine Sierra Nevada Forest, California, U.S.A.  
David L. Peterson, Michael J. Arbaugh, Lindsay J. Robinson, Berg R. Derderian
233
Experiments on Lichen Growth. I. Seasonal Patterns and Environmental Controls  
James B. Benedict
244
Dinitrogen Fixation (Acetylene Reduction) in Primary Succession near Mount Robson, British Columbia, Canada  
D. J. Blundon, M. R. T. Dale
255
Phytoplankton Dynamics in Three Rocky Mountain Lakes, Colorado, U.S.A.  
Diane M. McKnight, Richard L. Smith, J. Platt Bradbury, Jill S. Baron, Sarah Spaulding
264
Relationships among Depth to Frozen Soil, Soil Wetness, and Vegetation Type and Biomass in Tundra near Bethel, Alaska, U.S.A.  
Michael F. Gross, Michael A. Hardisky, James A. Doolittle, Vytautas Klemas
275
Sexual Differences in Temperatures of Blossoms on a Dioecious Plant, Salix arctica: Significance for Life in the Arctic  
P. G. Kevan
283
Surface Energy Balance of a Perennial Snowbank, Melville Island, Northwest Territories, Canada  
Kathy L. Young, Antoni G. Lewkowicz
290
Past and Present Permafrost Distribution in the Turtmanntal, Wallis, Swiss Alps  
Frank van Tatenhove, Richard Dikau
302
An Estimate of Snow Avalanche Debris Transport, Kaghan Valley, Himalaya, Pakistan  
Ian Bell, James Gardner, Fes de Scally
317
In Memoriam: Brian Sagar, 1927-1990  
Jim Lotz
322
Hydrology of Ice Caps in Volcanic Regions. By Helgi Björnsson   reviewed work
S. C. Lundstrom
323
The Frozen Earth: Fundamentals of Geocryology. By Peter J. Williams, Michael W. Smith   reviewed work
Frederick E. Nelson
323