Barker, D. J. P. Epidemiology in medical practice / by D. J. P. Barker and G. Rose - 2nd. ed. - Edinburgh : Churchill Livingstone, 1979 - 152 p. : ill. ; 22 cm. ISBN: 0443018510 LCCN: 78-41278 Subjects--Topical Terms: EpidemiologyMedicine, Preventive National Library of Medicine Call No.: WA105 / .B255e 1979 9