United States. Bureau of Dairy Industry. Division of Dairy Herd Improvement Investigations

• List of sires proved in dairy herd improvement associations, 1935-37
• List of sires proved in dairy herd improvement associations, 1938
• List of sires proved in dairy herd improvement associations, 1940
• List of sires proved in dairy herd improvement associations, 1941
• List of sires proved in dairy herd improvement associations, 1942
• List of sires proved in dairy herd improvement associations, 1943
• List of sires proved in dairy herd improvement associations, 1944
• List of sires proved in dairy herd improvement associations, 1945
• List of sires proved in dairy-herd improvement associations, 1948
• List of sires proved in dairy-herd improvement associations, 1949
• List of sires proved in dairy-herd-improvement associations, 1946
• List of sires proved in dairy-herd-improvement associations, 1947