96 
Psyche 
[March 
Acknowledgments 
This research was conducted with the aid of NSF Undergraduate 
Research Participation Grant No. GY-11203 to Concord Field 
Station, Harvard University. I am indebted to Mary Corn, Paul 
Miliotis, Robert E. Silberglied, William Stubblefield, and David 
S. Woodruff for assistance, advice, and encouragement. 
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