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Mongolia at fifty
Heaton jr, W. R., (1974)
Mongolia : troubled satellite
Heaton, William, (1973)
The fiftieth anniversary of the Mongolian People's Republic, 1921-1971
Rupen, Robert A., (1973)
Socialni problemi na dǔlgotrajnija godišen otdich na semejstva s deca
Tonev, Nikolaj, (1982)