RESIDUAL EFFECTIVENESS OF DDT IN THE 3RD SEASON AFTER APPLICATION
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INSTITUTO DE SALUBRIDAD Y MEDICINA TROPICAL, CD. MEXICO, DF, MEX
ROCKEFELLER FOUNDATION, CD. MEXICO, DF, MEX
INSTITUTO DE SALUBRIDAD Y MEDICINA TROPICAL, LABORATORIO DE QUIMICA, CD. MEXICO, DF, MEX
BUREAU OF ENTOMOLOGY AND PLANT QUARANTINE, ORLANDO, FL
ROCKEFELLER FOUNDATION, CD. MEXICO, DF, MEX
INSTITUTO DE SALUBRIDAD Y MEDICINA TROPICAL, LABORATORIO DE QUIMICA, CD. MEXICO, DF, MEX
BUREAU OF ENTOMOLOGY AND PLANT QUARANTINE, ORLANDO, FL
Abstract
Following a cytologic study of bone marrow an hypothesis has been suggested for the origin of a variety of plasma cells derived from erythroblasts Two factors, an unusual fragility in a particular line of erythroblasts and the presence of a toxic agent,