Sovershenno sekretno Moskva-Berlin, 1920-1933 : voenno-politicheskie otonosheniíà mezholu SSSR i Germanieĭ /
Gorlov, Sergei A.
Rossiĭskai︠a︡ akademii︠a︡ nauk.
Moskva : [IVI RAN],
1989.
Includes bibliographical references.
Espionage
Espionage