Document o9eD18vz3M6aOB1R52V6R7682.0. MECHANISMS OF FORMATION OF DIOXIN-LIKE COMPOUNDS DURING COMBUSTION OF ORGANIC MATERIALS - Exposure and Human Health Reassessment of 2,3,7,8-Tetrachlorodibenzo-p-Dioxin (TCDD) and Related Compounds - Part I: Estimating Exposure to Dioxin-Like Compounds - Volume 1: Sources of Dioxin-Like Compounds in the United States