Title: Osnovopolozhniki russkogo pochvovedenii︠a︡--Dokuchaev, Kostychev, Vilʹi︠a︡ms
People: V. V. Dokuchaev (1846-1903), P. A. Kostychev (1845-1895), V. R. Vilʹi︠a︡ms (1863-1939)