Стамен Григоров
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Health
Stamen Grigorov: Google Doodle celebrates the 142nd birthday of a Bulgarian physician who discovers Lactobacillus bulgaricus essential to yogurt and tuberculosis vaccine
Google celebrates the 142nd birthday of a famous Bulgarian physician and microbiologist Dr. Stamen Grigorov (Д-р Стамен Григоров), who found…
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