. . . . . . . . . . . . . . "Records and correspondence"@en . . . . . . . . . . . . . . . . . "Textbooks"@en . . . "Bibliographies"@en . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "United States" . . "San Juan (P.R.)" . . "Ecuador" . . . . "Quito (Ecuador)" . . "Puerto Rico" . . "University of Puerto Rico. School of Tropical Medicine." . . "Cambridge (Mass.)" . . "Massachusetts" . .