Here is a link to Ross & Matthews The social biology of wasps: http://books.google.com/books?id=QeGVqm ... &q&f=false
Here is a link to a downloadable copy of Albert Greene's chapter (7) on Dolichovespula and Vespula in: Ross & Matthews The social biology of wasps: http://www.academia.edu/4434375/Greene_ ... asps_1991_