%0 Journal Article %T The comparative morphology of Marshallagia marshalli and ostertagia occidentalis(Nematoda,Strongylida,Trichostrongylidea) by scnning electron microscopy %A Borji, Hassan %A Raji, Ahmad Reza %A Naghibi, Abolghasem %J Parasitology Research %@ 0932-0113 %D 2011