[Frequency of the contamination of milk available in the Valley of Mexico with streptomycin, tetracycline and penicillin].
D000818:Animals; D002417:Cattle; D005506:Food Contamination; D007225:Infant Food / Q000032:analysis; D008800:Mexico; D008892:Milk / Q000032:analysis*; D010406:Penicillins / Q000032:analysis*; D013307:Streptomycin / Q000032:analysis*; D013754:Tetracyclines / Q000032:analysis*
D010406:Penicillins; D013754:Tetracyclines; D013307:Streptomycin
Frecuencia de la contaminación de la leche disponible en el Valle de México con estreptomicina, tetraciclina y penicilina.