title: Persistence of heptachlor in egg yolks.
mesh_terms: D000818:Animals; D002645:Chickens / Q000378:metabolism*; D002849:Chromatography, Gas; D004530:Egg Yolk / Q000032:analysis*; D005260:Female; D007306:Insecticides / Q000032:analysis*
chemical_list: D007306:Insecticides