Links
[1] http://www.agricultureinformation.com/
[2] https://www.e-education.psu.edu/earth540/sites/www.e-education.psu.edu.earth540/files/Naylor.Science.ed.06.pdf
[3] https://www.e-education.psu.edu/earth540/sites/www.e-education.psu.edu.earth540/files/AqucultureLawmakers3Aug2009.html
[4] http://www.thefishsite.com/fishnews/8426/us-organic-aquaculture-draws-widerange-criticism
[5] http://aquaculture.noaa.gov/