title: On the Presence of Ostertagia Species and Teladorsagia davtiani in Sheep in Canada.
abstract: The presence of Ostertagia species and Teladorsagia davtiani in Maritime sheep is briefly discussed. The diagnostic features of O. trifurcata and T. davtiani are depicted photomicrographically.
authors.forename: H J
authors.initials: HJ
authors.lastname: Smith
authors.forename: R M
authors.initials: RM
authors.lastname: Archibald