Life history of lungworms parasitic in swine
Schwartz, Benjamin, Alicata, Joseph E.
Life history of lungworms parasitic in swine - Washington 1934 - 1-41 p. - History United States Department of Agriculture. Technical Bulletin No. 456 .
Life history of lungworms parasitic in swine - Washington 1934 - 1-41 p. - History United States Department of Agriculture. Technical Bulletin No. 456 .