Media type: E-Article Title: Duration of Toxicity of Several DDT Residual Sprays under Conditions of Malaria-Control Operations Contributor: Knowles, Frederick L.; Smith, Clinton S. Published: JSTOR, 1946 Published in: Public Health Reports (1896-1970), 61 (1946) 50, Seite 1806 Language: English DOI: 10.2307/4585943 ISSN: 0094-6214 Keywords: General Medicine Origination: Footnote: Access State: Open Access