The Washington Tilth Association (originally the Northwest Tilth Association) is an American nonprofit membership organization dedicated to supporting and advocating organic food and farming.
Sanders, Jeffery Craig (2010). Seattle and the Roots of Urban Sustainability: Inventing Ecotopia. University of Pittsburgh Press. ISBN9780822962106. (review)
Selfa, T.; Jussaume Jr., R.A. (2009). "Sustainable Foodscapes? Examining consumer attitudes and practices towards food and farming in Washington State, USA". In R. Fish; S. Seymour; M. Steven; C. Watkins (eds.). Sustainable Farmland Management: Transdisciplinary Approaches. CABI. pp.107–121. ISBN9781845933517.
Tilth (Association) (1982). The Future is Abundant: A Guide to Sustainable Agriculture. Tilth. ISBN9780931380013.
Further reading
Korn, Larry; Snyder, Barbara; Musick, Mark, eds. (1982). The Future is Abundant: A Guide to Sustainable Agriculture. Tilth. ISBN0931380014.
MacDougall, Erin (February 9, 2011). "Mark Musick: Looking Ahead 'In Good Tilth'". IATP Food and Community Fellows. Institute for Agriculture and Trade Policy. Retrieved December 17, 2014.
Musick, Mark (February 12, 2008). "The History of the Tilth Movement". Seattle Tilth. Seattle Tilth Association. Archived from the original on September 16, 2008. Retrieved December 17, 2014.
Seattle Parks Foundation. "Urban Farming in Rainier Beach"(PDF). Connections. Seattle Parks Foundation. Retrieved December 17, 2014.