Han, Guang.

Perceptions of secondary school agriculture teachers regarding biomass production education in Iowa. by: Han, Guang.; Iowa State University., Agricultural Education and Studies. (書目-電子資源)

Motivations, Challenges, Benefits, and Educational Needs Associated with Organic Grain Farming Adoption in Iowa. by: Han, Guang.; Iowa State University., Agricultural Education and Studies. (書目-電子資源)