Search Results       Your search for [author]Wittwer, S. H. (Sylvan Harold), 1917- returned 1 record.           Food, climate, and carbon dioxide : the global environment and world food production. by Wittwer, S. H. (Sylvan Harold), 1917-; Boca Raton: Lewis Publishers, 1995. Subject: Crops and climate; Climatic changes; Crops -- Effect of atmospheric carbon dioxide on; Global warming.          Add to Book Cart Relevance: 33.47%