Hog lice and hog mange methods of control and eradication
Kemper, H.E., Peterson, H.O.
Hog lice and hog mange methods of control and eradication - Washington 1920 - 1-22 p. - Hog, Eradication United States Department of Agriculture. Farmers Bulletin No. 1085 .
Hog lice and hog mange methods of control and eradication - Washington 1920 - 1-22 p. - Hog, Eradication United States Department of Agriculture. Farmers Bulletin No. 1085 .