text Churchill Livingstone 1984 3 rd. ed. eng viii, 158 : ilus. 23 cm. D.J.P. Barker EPIDEMILOGY 614.4 614.4 Bar e 1 INLIS000000000046134 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)