Dr. Don Hendricks -li- August 28, 1972 be a chance to review it unit by unit and suggest changes as needed to meet various people's judgement as to what is essential. This letter has been written in haste, and may thus be ambiguous in places. Please don't hesitate to call for clarification. Sj cerely yours, L. L. Eberhardt Research Associate Ecosystems LLE:sac cc: EM Douthett NV0O P Dunaway NVO0O 0 Lynch NVCO RO Gilbert V Schultz BNW WSsuU