1 daughter colonies of the 4a were tested:
DE-8-52-1432-1967
4 tested queens were mated at the mating station:
DE-8-52-1589-1968 DE-8-52-1599-1968 DE-14-15-10-1968 DE-14-15-11-1968
5 daughter colonies of queens mated at the mating station were tested:
DE-8-52-51-1969 DE-8-52-52-1969 DE-8-52-53-1969 DE-8-52-54-1969 DE-8-52-1718-1969