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421. Industrial hygiene manual supplement: pictures of processes, processes, toxic agents, suggested control measures, health hazards

427. The Era key to the U.S.P: a complete list of the drugs and preparations of the United States Pharmacopoeia, revision of 1890-3 : giving official titles, common names and synonyms of the drugs, chemicals and preparations of the Pharmacopoeia, with doses in apothecaries weights and measures with equivalents in metric terms

429. Children's behavioral health services in Baltimore: walking the continuum : site visit report