Michael W. Robbins has written: 'Crops and carbon' -- subject(s): Leadership, Economic conditions, Sustainable development, Agriculture, Environmental aspects, Farmers, Economic aspects '1991 Top Ten Almanac' 'The Principio Company' -- subject(s): History, Iron industry and trade, Principio Company 'Birds (Fandex Family Field Guides)' 'Whole green catalog' -- subject(s): Sustainable living, Green movement, Catalogs, Green products, Environmentalism '1991 top 10 almanac' -- subject(s): American Almanacs, Handbooks, vade-mecums, Miscellanea 'High country trail' 'Brooklyn'