PubMed · 1979 · 10 citations · 0 references
PharmacyEnvironmental SciencesToxicologyEcotoxicologyEnvironmental HealthEnvironmental ToxicologyOrgan ToxicityPersistent Organic Pollutant ToxicityPolychlorinated Biphenyl EffectsPolychlorinated Biphenyl ExposurePolychlorinated Biphenyls
Theodore Roosevelt's secretary thanks Courtlandt Babcock for his letter to Roosevelt on the latter's behalf and apologizes for the lack of a more personal reply.