Calamansi Production
   Information on all aspects of growing this fruit in the Philippines, and some ideas for products that can be made from it.
   http://www.da.gov.ph/tips/calamansi.html

Citrus Horticulture Program at SWFREC
   We serve the extension and applied research needs for 179,093 acres of commercial plantings in the Southwest Florida Gulf Coast region.
   http://www.imok.ufl.edu/citrus/

Citrus Research & Education Center
   University of Florida research, teaching and extension center devoted to citrus, addressing issues in horticulture, pests and diseases, and processing technology. Information about departments and facilities, list of publications.
   http://www.lal.ufl.edu/

Citrus Research International
   Description of the research projects, the facilities and services offered and contact details.
   http://www.citrusres.com

Citrus Varieties and Rootstocks
   Species descriptions and cultivation practices.
   http://edis.ifas.ufl.edu/TOPIC_Citrus

Citrus fruit - The different varieties.
   Fruit, citrus fruit. Information about the citrus fruits. Nutritional values, use, storage, history, and particular characteristics.
   http://www.thefruitpages.com/citrus.shtml

Crop Profile for Citrus in California
   A summary of the integrated pest management tools that are available to control economically important pests in the citrus industry in this state.
   http://www.ipmcenters.org/CropProfiles/docs/CAcitrus2.pdf

Don's Citrus Blog
   Research and breeding of cold hardy (Citrus x Poncirus) hybrids for USDA climate zone 7.
   http://citrus.name

Florida Citrus
   Geared toward the consumer, this site provides nutrition, recipe, and purchasing information, along with links.
   http://www.floridajuice.com/floridacitrus/intro.html

Growing Citrus Fruits
   Information on all aspects of cultivating these fruits in the Philippines including varieties specially adapted to the country.
   http://www.da.gov.ph/tips/citrus.html

NSW Agriculture Citrus Info
   latest citrus research news, citrus contacts. As well as detailed information on growing citrus.
   http://www.agric.nsw.gov.au/citrus

NSW Department of Primary Industries: Citrus
   Collection of articles by Australian governmental agency on cultivating citrus, pests and diseases, soil management, and managing fruit quality.
   http://www.agric.nsw.gov.au/reader/citrus

Texas Citrus
   Information and resources for citrus growers.
   http://aggie-horticulture.tamu.edu/citrus/tamuhort.html

The Ultimate Citrus Page
   Information and links regarding anything citrus related, from agriculture to weather.
   http://www.ultimatecitrus.com

Vines in Florida Citrus
   Article with photographs on the vine weeds that can be found in Florida citrus groves and how to control them.
   http://edis.ifas.ufl.edu/HS318