BEES AND BEEKEEPING: SCIENCE, PRACTICE, AND WORLD RESOURCES
is the most comprehensive book on the subject. It is by one
of the world's leading experts, Dr. Eva Crane. Although it
is very expensive, I have purchased a copy and find it well
worth the investment.
 
I am sure that North Americans can obtain details on how to
get the book here, but for international sales, and for
North Americans too, it can be obtained from
Inetrnational Bee Research Association, 18 North Rd.,
Cardiff, CF1 3DY, Wales, U.K. for 95 Pounds Stirling (+ 2 Pounds
for overseas shipping).