1 daughter colonies of the 4a were tested:
CH-51-105-2453-1985
2 tested queens were mated at the mating station:
CH-51-101-2777-1988 CH-51-202-3141-1988
7 daughter colonies of queens mated at the mating station were tested:
CH-51-180-3235-1990 CH-51-180-3236-1990 CH-51-180-3237-1990 CH-51-180-3238-1990 CH-51-181-3472-1990 CH-51-182-3228-1990 CH-51-182-3584-1990