Reducing Greenhouse Effect—Presentation, Box: 53, Folder: F17. Karl Wolfgang Böer papers, MSS 0483. University of Delaware Library Special Collections.
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Reducing Greenhouse Effect—Presentation, Box: 53, Folder: F17. Karl Wolfgang Böer papers, MSS 0483. University of Delaware Library Special Collections. https://findingaids.lib.udel.edu/repositories/2/archival_objects/90164 Accessed September 18, 2024.
