Citrus Extension
Citrus Tristeza
Field Diagnosis of Citrus Tristeza Virus
http://edis.ifas.ufl.edu/hs242
Florida Citrus Pest Management Guide: Tristeza
http://edis.ifas.ufl.edu/cg039
Citrus Greening, Blight and Tristeza Comparison Identification Sheet
http://edis.ifas.ufl.edu/pp263
