American foulbrood of honey bees : --how to control it /
Michael, A. S.(Albert Sylvester),1910-
United States.Department of Agriculture.
Washington, D.C. : U.S. Dept. of Agriculture,
1954.
"Revision of and supersedes Farmers' bulletin no. 1713: The treatment of American foulbrood" [by James I. Hambleton].
American foulbrood.
Bees