. . . . . . . . "Pyotr Pokryshev" . . . . . . . . . . "1967" . "1914" . . . . . . . . . . . . . . . . . . . . . . "Pyotr Ponomaryov" . . . . . . "Pyotr Fomichev" . "1934" . . . . "1934" . "Pyotr Pokryshev" . . . "Pyotr Markov" . . . . . . . . . "Pyotr Afanasyevich Pokryshev" . . . .