Physiologist Ivan Petrovich Pavlov 26 September 1849 (+) is born in Ryazan, Russia. 27 February 1936 (-) dies of pneumonia in Leningrad, Russia. |
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More info on Wikipedia |
Physiologist Ivan Petrovich Pavlov 26 September 1849 (+) is born in Ryazan, Russia. 27 February 1936 (-) dies of pneumonia in Leningrad, Russia. |
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More info on Wikipedia |