Suggest "Breeding Techniques and Selection for Breeding of the Honeybee"
 
freidrich Ruttner , written in German and Translated by Asheigh and Eric
Milner
Published by British Isles Bee Breeders Assoc
 
Available on interlibrary Loan from University of Conn ,Waterbury Branch  Bee
Collection  R 982 B 832
 
I am reading it now and will be returning  it after Labor Day