cooperative extension service

Information Service. [7] Lanini, W. T. Undated. Organic weed management in vineyards. University of California, Davis Cooperative Extension. [8] （页面存档备份，存于互联网档案馆）

（页面存档备份，存于互联网档案馆） EENY-537. Entomology and Nematology, Florida Cooperative Extension Service. University of Florida IFAS. Published 2012, revised 2013.

Commercial Growers, Bessin R., Ed.; University of Kentucky Cooperative Extension Service, 2009, pp 135, ID-36 Environmental Protection Agency. "Bensulide

在美国，“推广代表”（extension agent）是开发并进行教育项目的雇员。这些项目帮助人们进行经贸、社区发展、管理、家庭事务、农业及环境方面的工作。推广代表还需要帮助四健会及青年人。一些赠地大学的推广代表也为合作推广服务（英语：cooperative extension service

Kentucky Cooperative Extension Service. HortFact – 31- 01. （英文） Kurtural, S.K. 2007. Vineyard Design. University of Kentucky Cooperative Extension Service. HortFact