The Safety of foods; an international symposium on the safety and importance of foods in the Western Hemisphere held at the University of Puerto Rico, Mayagüez. Editors: J. C. Ayres [and others].
"Organized by the Toxicology Study Section, U.S. Public Health Service, in cooperation with the Biology Department, University of Puerto Rico, Mayagüe...
"Organized by the Toxicology Study Section, U.S. Public Health Service, in cooperation with the Biology Department, University of Puerto Rico, Mayagüez."