Laing, J. A. Trichomonas foetus infection of cattle / J. A. Laing - Rome : FAO, 1956 - vii, 39 p. ; 23 cm. - FAO agricultural studies ; no. 33 . Bibliography: p. 37-39 Subjects--Topical Terms: Trichomonas foetusTrichomoniasis Dewey Class. No.: 630.82