1-2 of 2 Books
Drevnerusskiĭ i︠a︡zyk
By Nikolaĭ Dmitrievich Rusinov
Lev Krevzaʼs Obrona iednosci cerkiewney ; and, Zaxarija Kopystensʹkyjʼs Palinodija
By Lev Krevza,Omeljan Pritsak,Bohdan Struminsky