Concise International Chemical Assessment Document 53 http://www.inchem.org/documents/cicads/cicads/cicad53.htm Hydrogen Sulfide (Cicads 53, 2003) Concise International Chemical Assessment Document 53 Concise International Chemical Assessment Document 53 WHO (CICAD 53): Hydrogen Sulfideexternal icon Concise International Chemical Assessment Document 53 Concise International Chemical Assessment Document 53 WHO (CICAD 53): Hydrogen Sulfideexternal icon http://www.inchem.org/documents/cicads/cicads/cicad53.htm Concise International Chemical Assessment Document 53 Concise International Chemical Assessment Document 53