TY - BOOK T1 - Epidemiology for the health officer a field manual for the tropics A2 - Phoon, W. O. LA - English PP - Geneva PB - World Health Organization YR - 1985 UL - https://ds.mainlib.upd.edu.ph/Record/UP-1685523046125400060 OP - 163 CN - RA 651 E65 1985 KW - Epidemiology. KW - Epidemiologic Methods. ER -