Great sites about Extension:
A).Journals:

1).MY Major supervisor
2).Journal of Extension
3).Journal of Extension Systems
4).Journal of International Agricultural and Extension Education
5).The Journal of Agricultural Education and Extension
6).Journal of Agricultural Education (JAE)
7).Journal of Natural Resources (GNRSLE)
8).Journal of Applied Communications
9).Rural Society
10).Journal of Public Service & Outreach
11).Indigenous Knowledge and Development Monitor
12).ROSE-NET
13).IRANDOC