United States. Bureau of Animal Industry Β· William Dickson Β· Vickers T. Atkinson Β· Adolph Eichhorn Β· James Law Β· Richard West Hickman Β· Leonard Pearson Β· Milton R. Trumbower Β· Benjamin Tilghman Woodward
ΡΠ°Π½. 1923β―Π³. Β· U.S. Government Printing Office