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