Ekonomicheskaya karta: Gor'kovskaia oblast. Mariyskaia, Chuvashskaia ASSR. Kirovskaia oblast i Udmurtskaia ASSR
Ekonomicheskaya karta Gor'kovskaia Oblast. Ekonomicheskaya karta Kirovskoy obl., Udmurtskoy, Mariyskoy i Chuvashskaia ASSR. Bolshoi Sovietskii Atlas Mira II. Moskva 1939.
David RumseyKutafʹev, S. A.
1939
1939
Glavnoe upravlenie geodezii i kartografii