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Studies on Trachoma

V. Clinical Observations in a Field Trial of Bivalent Trachoma Vaccine at Three Dosage Levels in Saudi Arabia

R. L. Nichols, S. D. Bell Jr., E. S. Murray, N. A. Haddad, and A. A. Bobb
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Studies on Trachoma

IV. Investigations in Portugal on Formalin-Killed Trachoma Vaccines with Special Reference to Serologic Response

A. Arnaldo Sampaio, Laura Ayres, N. A. Haddad, S. D. Bell Jr., E. S. Murray, and J. C. Snyder
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