TY - GEN AU - Stallones R.A. ED - PAHO/WHO Lectures on the Biomedical Sciences (4th : 1971 : Washington). TI - Environment, ecology, and epidemiology T2 - (PAHO scientific publication; no. 231) PY - 1971/// CY - Washingto PB - Pan American Health Organization KW - Environmnet KW - Ecology KW - Epidemiology ER -