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Filtering by: Funding statement This work was supported in part by the Biomedical and Environmental Research Division of the U. S. Department of Energy under contract No. W-7405-ENG-48 and by National Science Foundation Grant PCM 76-5074. Remove constraint Funding statement: This work was supported in part by the Biomedical and Environmental Research Division of the U. S. Department of Energy under contract No. W-7405-ENG-48 and by National Science Foundation Grant PCM 76-5074. Creator United States. Agricultural Research Service Remove constraint Creator: United States. Agricultural Research Service

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