Parry, Wilfrid H. Communicable diseases : an epidemiological approach / by Wilfrid H. Parry - 2nd ed. - London : English Universities Press, 1973 - 194 p. ; 22 cm. ISBN: 0340177055 Subjects--Topical Terms: Communicable diseases National Library of Medicine Call No.: WC100 / .P265i 1973 9