Russkai︠a︡ sfragistika i geralʹdika /
Kamenit︠s︡eva, Elena Ivanovna.
Usti︠u︡gov, Nikolai Vladimirovich.
Moskva :  Vysshai︠a︡ Shkola, 
1974.
Seals (Numismatics)
Emblems, National