Sbornik materialov sovmestnoi nauchnoi sessii Riazanskogo gosudarstvennogo pedagogicheskogo instituta (RSFSR) i pedagogicheskogo instituta Erfurt-Miulʹkhauzen (GDR) [mart-aprelʹ, 1970

P. P. Kirʹianov, Ri︠a︡zanskiĭ gosudarstvennyĭ pedagogicheskiĭ institut, Erfurt. Pädagogisches Institut