Do You Know the Symptoms of a Bee Sting Allergy?
http://www.webmd.com/allergies/understanding-bee-sting-allergies-symptoms
Understanding Bee Stings -- Diagnosis & Treatment
http://www.webmd.com/allergies/understanding-bee-sting-allergies-treatment
A Field Guide to Honey Bees and Their Maladies    (Penn State College of Agricultural Sciences)
Honey Bee Health Coalition - Tools for Varroa Destructor Management
Project Apis m.   (Project Apis mellifera)
Ohio State University Bee Lab
The site has plenty of online (recorded) webinars and bee facts sheets.
University of Florida Honey Bee Research & Extension Lab
Mid-Atlantic Apiculture Research and Extension
 Extension Bee Health

University of Illinois Extension Logan/Menard/Sangamon Office

http://web.extension.illinois.edu/lms/
Scientific Beekeeping   (www.scientificbeekeeping.com)
Beekeeping Through the Eyes of a Biologist - Randy Oliver
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Langstroth on the Hive & the Honey-Bee  Audio Book on LibreVox

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Cornell University Bee Library