HCHs
tanım: HCH HCH (hexachlorocyclohexane) hexachlorocyclohexane

HCR
tanım: UNHCR, United Nations High Commissioner for Refugees, United Nations organization responsible for coordinating international action for the world-wide protection of refugees and the resolution of refugee problems

HCRs
tanım: HCR UNHCR, United Nations High Commissioner for Refugees, United Nations organization responsible for coordinating international action for the world-wide protection of refugees and the resolution of refugee problems