Pavlov, Ivan Petrovich, 1849-1936

I. P. Pavlov and W. T. Pavlov
I. P. Pavlov and W. T. Pavlov are standing next to each other in front of a building.
Ivan Petrovich Pavlov
Pavlov is standing in front of a building with his arms folded.
I. P. Pavlov and Jacques Loeb
I. P. Pavlov and Jacques Loeb are standing in a circle with another man talking in front of a building.